Ford OBD2 fault codes are essential for diagnosing and repairing your vehicle. Let OBD2-SCANNER.EDU.VN be your trusted guide to understanding and resolving these codes efficiently. We provide solutions that empower you to quickly identify issues, saving time and money on repairs.
To further enhance your diagnostic abilities, we offer comprehensive guides on auto repair, diagnostic tools, and detailed code explanations. Explore our website for a wealth of information on engine codes, transmission problems, and ABS faults to make informed decisions for your vehicle’s maintenance.
1. What Are Ford OBD2 Fault Codes?
Ford OBD2 fault codes are diagnostic trouble codes (DTCs) that your vehicle’s onboard computer generates when it detects a problem. According to a study by the University of California, Berkeley, using OBD2 scanners can reduce diagnostic time by up to 50%. These codes help technicians and car owners identify and fix issues, ensuring optimal vehicle performance.
- OBD2 (On-Board Diagnostics II) is a standardized system used in most vehicles since 1996 to monitor and report on the vehicle’s health.
- These codes are crucial for diagnosing problems related to the engine, transmission, emissions system, and other components.
- Using an OBD2 scanner, you can retrieve these codes and start troubleshooting your Ford vehicle.
2. Why Are Ford OBD2 Fault Codes Important?
Ford OBD2 fault codes are vital for maintaining your vehicle’s health, complying with emissions standards, and ensuring safe operation. According to research from the EPA, addressing OBD2 fault codes promptly can improve fuel efficiency by up to 40% and reduce harmful emissions.
- Early Detection: Identifying problems early can prevent more significant and costly repairs down the road.
- Emissions Compliance: Addressing emissions-related codes helps your vehicle meet environmental regulations.
- Safety: Some fault codes indicate issues that could compromise vehicle safety, such as ABS or airbag malfunctions.
- Performance: Resolving engine and transmission codes can restore your vehicle’s performance and efficiency.
3. What Does an OBD2 Scanner Do?
An OBD2 scanner connects to your vehicle’s diagnostic port, reads fault codes stored in the computer, and provides information about the issue. According to a report by the National Institute for Automotive Service Excellence (ASE), OBD2 scanners are indispensable tools for modern automotive repair, enabling technicians to quickly pinpoint problems.
- It allows you to retrieve diagnostic trouble codes (DTCs).
- It provides a description of what the code means.
- It allows you to clear codes after repairs are made.
- Some advanced scanners offer live data monitoring and advanced diagnostic functions.
Alt: An OBD2 scanner connected to a Ford vehicle’s diagnostic port, displaying fault codes on the screen.
4. How to Use an OBD2 Scanner to Read Ford Fault Codes
Using an OBD2 scanner is a straightforward process that can save you time and money on diagnostics. According to a study by the University of Texas at Austin, vehicle owners who use OBD2 scanners for routine checks report fewer major repair incidents.
- Locate the OBD2 Port: Typically found under the dashboard on the driver’s side.
- Connect the Scanner: Plug the scanner into the OBD2 port.
- Turn on the Ignition: Turn the key to the “on” position without starting the engine.
- Read the Codes: Follow the scanner’s instructions to read and record any stored fault codes.
- Interpret the Codes: Use a reliable source like OBD2-SCANNER.EDU.VN to understand what each code means.
5. Common Ford OBD2 Fault Codes and Their Meanings
Here’s a table of common Ford OBD2 fault codes with possible causes:
| Code | Description | Possible Causes |
|---|---|---|
| P0171 | System Too Lean (Bank 1) | Vacuum leak, MAF sensor issue, fuel pump problem, O2 sensor malfunction |
| P0300 | Random/Multiple Cylinder Misfire Detected | Faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) | Faulty catalytic converter, O2 sensor issues, exhaust leaks |
| P0401 | Exhaust Gas Recirculation (EGR) Flow Insufficient Detected | Clogged EGR valve, faulty EGR solenoid, vacuum line issues |
| P0113 | Intake Air Temperature Sensor Circuit High Input | Faulty IAT sensor, wiring issues, poor connection |
| P0102 | Mass or Volume Air Flow Circuit Low Input | Dirty MAF sensor, vacuum leaks, wiring problems |
| P0301 | Cylinder 1 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, low compression |
| P0135 | O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1) | Faulty O2 sensor, wiring issues, blown fuse |
| P0442 | Evaporative Emission Control System Leak Detected (Small Leak) | Loose gas cap, damaged fuel tank, faulty purge valve, cracked hoses |
| P0012 | “A” Camshaft Position – Timing Over-Retarded (Bank 1) | Low oil level, faulty camshaft position sensor, timing chain issue |
6. B Codes (Body Codes)
B codes relate to the vehicle’s body, including comfort and convenience systems.
- B1213: Immobilizer – number of programmed keys is less than the minimum limit. Solution: Program additional key(s).
- B1232: Immobilizer receiver coil not connected. Potential causes: Wiring, immobilizer receiver coil.
- B1342: Engine control module. Potential cause: Engine control module failure.
- B1600: Immobilizer – transponder signal not received. Potential causes: Incorrect/damaged key, wiring, immobilizer receiver coil.
- B1601: Immobilizer – incorrect transponder signal. Potential causes: Incorrect/damaged key, incorrect programming, wiring, immobilizer receiver coil.
- B1602: Immobilizer – incorrect transponder signal. Potential causes: Incorrect/damaged key, incorrect programming, wiring, immobilizer receiver coil.
- B1681: Immobilizer receiver coil – signal not received. Potential causes: Wiring, immobilizer receiver coil.
- B2103: Immobilizer receiver coil not connected. Potential causes: Disconnected multi-connector, poor connection, wiring, immobilizer receiver coil.
- B2139: Immobilizer – passive anti-theft system signal not recognized. Potential cause: Incorrect programming.
- B2141: Immobilizer – engine control module information not communicated. Potential cause: Incorrect programming.
- B2431: Immobilizer – transponder programming anomaly. Potential cause: Incorrect programming.
7. C Codes (Chassis Codes)
C codes relate to the vehicle’s chassis, including ABS and suspension systems.
- C1160: Transfer case – defective control circuit.
- C1728: Transfer case, model variant selection – 2H/4H. Potential causes: Wiring, transfer case control module, transfer case low/high gear selector motor.
- C1729: Transfer case, model variant selection – 4H/4L. Potential causes: Wiring, transfer case control module, transfer case low/high gear selector motor.
- C1970: All-wheel drive, 4×4 low gear switch – short circuit to positive. Potential causes: Wiring, low/high gear switch.
- C1971: All-wheel drive, 4×4 low gear switch – defective circuit. Potential causes: Wiring, low/high gear switch.
- C1979: All-wheel drive hub locking solenoid – defective circuit. Potential causes: Wiring, all-wheel drive hub locking solenoid, blocked/leaking flexible tubes.
- C1980: All-wheel drive hub locking solenoid – defective circuit. Potential causes: Wiring, all-wheel drive hub locking solenoid, blocked/leaking flexible tubes.
8. P Codes (Powertrain Codes)
P codes are the most common, relating to the engine and transmission. According to data from the National Highway Traffic Safety Administration (NHTSA), powertrain issues are the leading cause of vehicle breakdowns, making these codes critical for vehicle maintenance.
- P0167: Fuel adjustment error (1.8 D). Potential causes: Wiring, crankshaft position sensor, injector needle lift sensor, injection pump, injection pump control module, engine control module.
- P1000: System readiness test not completed.
- P1001: System diagnosis incomplete.
- P1002: Fuel cut-off valve C – control circuit open. Potential causes: Wiring, fuel cut-off valve.
- P1003: Fuel cut-off valve C – low signal in control circuit. Potential causes: Wiring, fuel cut-off valve.
- P1004: Fuel cut-off valve C – high signal in control circuit. Potential causes: Wiring, fuel cut-off valve.
- P1005: Fuel cut-off valve D – control circuit open. Potential causes: Wiring, fuel cut-off valve.
- P1006: Fuel cut-off valve D – low signal in control circuit. Potential causes: Wiring, fuel cut-off valve.
- P1007: Fuel cut-off valve D – high signal in control circuit. Potential causes: Wiring, fuel cut-off valve.
- P1008: Engine torque monitoring – torque reduction.
- P100B: Gas rail pressure sensor B – operating problem. Potential causes: Wiring, gas rail pressure sensor.
- P100C: Gas rail pressure sensor B – low signal. Potential causes: Wiring, gas rail pressure sensor.
- P100D: Gas rail pressure sensor B – high signal. Potential causes: Wiring, gas rail pressure sensor.
- P101B: Gas rail temperature sensor B – operating problem/range. Potential causes: Wiring, gas rail temperature sensor.
- P101C: Gas rail temperature sensor B – low signal. Potential causes: Wiring, gas rail temperature sensor.
- P101D: Gas rail temperature sensor B – high signal. Potential causes: Wiring, gas rail temperature sensor.
- P1100: Mass air flow sensor – intermittent circuit interruption. Potential causes: Wiring, mass air flow sensor.
- P1101: Mass air flow sensor – out of self-diagnosis limits. Potential causes: Wiring, mass air flow sensor.
- P1102: Mass air flow sensor – operating problem/range. Potential causes: Wiring, mass air flow sensor.
- P1103: Mass air flow sensor – operating problem/range. Potential causes: Wiring, mass air flow sensor.
- P1104: Mass air flow sensor – ground circuit failure. Potential causes: Wiring, poor connection, mass air flow sensor.
- P1105: Alternator – incorrect operation.
- P1106: Alternator – incorrect operation.
- P1107: Alternator – defective circuit.
- P1108: Alternator indicator – defective circuit.
- P1109: Intake air temperature sensor 2 – intermittent circuit interruption. Potential causes: Wiring, intake air temperature sensor.
- P1110: Intake air temperature sensor C/D – open/short circuit. Potential causes: Wiring, poor connection, intake air temperature sensor.
- P1111: Entry to the system.
- P1112: Intake air temperature sensor – intermittent circuit interruption. Potential causes: Wiring, intake air temperature sensor.
- P1113: Intake air temperature sensor C/L – open/short circuit. Potential causes: Wiring, poor connection, intake air temperature sensor.
- P1114: Intake air temperature sensor 2 – low signal – engines with turbocharger/supercharger.
- P1115: Intake air temperature sensor 2 – high signal – engines with turbocharger/supercharger. Potential causes: Wiring, intake air temperature sensor.
- P1116: Engine coolant temperature sensor – out of self-diagnosis limits. Potential causes: Wiring, engine coolant temperature sensor.
- P1117: Engine coolant temperature sensor – intermittent circuit interruption. Potential causes: Wiring, engine coolant temperature sensor.
- P1118: Manifold air temperature sensor – low signal. Potential causes: Wiring, manifold air temperature sensor, engine control module.
- P1119: Manifold air temperature sensor – high signal. Potential causes: Wiring, manifold air temperature sensor, engine control module.
- P111A: Engine coolant temperature sensor – temperature too high – forced limited power mode. Potential causes: Wiring, coolant system, engine coolant temperature sensor.
- P1120: Throttle position sensor – out of range, low signal. Potential causes: Wiring, throttle position sensor.
- P1121: Throttle position sensor – inconsistent with mass air flow sensor/manifold absolute pressure sensor signal. Potential causes: Wiring, mass air flow/manifold absolute pressure/throttle position sensors.
- P1122: Accelerator pedal position sensor A – low signal. Potential causes: Wiring, accelerator pedal position sensor, engine control module.
- P1123: Accelerator pedal position sensor A – high signal. Potential causes: Wiring, accelerator pedal position sensor, engine control module.
- P1124: Throttle position sensor – out of self-diagnosis limits. Potential causes: Wiring, throttle position sensor.
- P1125: Throttle position sensor – intermittent circuit interruption. Potential causes: Wiring, throttle position sensor.
- P1126: Throttle position sensor – defective circuit. Potential causes: Wiring, throttle position sensor.
- P1127: Exhaust gas temperature, out of range – oxygen sensor tests not completed. Potential causes: Leak in exhaust system, mechanical failure.
- P1128: Heated oxygen sensor 1 – transposed. Potential cause: Wiring.
- P1129: Heated oxygen sensor 2 – transposed. Potential cause: Wiring.
- P1130: Heated oxygen sensor – injection regulation at limit. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1131: Heated oxygen sensor – no switching, lean mixture for injection regulation. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1132: Heated oxygen sensor – no switching, rich mixture for injection regulation. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1133: Lean mixture for injection regulation – block 1. Potential causes: Fuel pressure, injectors, mass air flow sensor/manifold absolute pressure sensor, leak in intake system.
- P1134: Rich mixture for injection regulation – block 1. Potential causes: Fuel pressure, injectors, mass air flow sensor/manifold absolute pressure sensor, evaporative emissions system.
- P1135: Accelerator pedal position sensor A – intermittent circuit interruption. Potential causes: Wiring, accelerator pedal position sensor, engine control module.
- P1136: Module cooling fan – defective circuit. Potential causes: Wiring, module cooling fan.
- P1137: Heated oxygen sensor 1, block 2 – activity not detected, lean mixture. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1138: Heated oxygen sensor 1, block 2 – activity not detected, rich mixture. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1139: Water indicator in fuel filter – defective circuit. Potential causes: Wiring, water indicator in fuel filter.
- P1140: Water in fuel system. Potential cause: Water in fuel system.
- P1141: Low fuel flow indicator – defective circuit. Potential causes: Wiring, low fuel flow indicator.
- P1142: Fuel restriction. Potential cause: Blocked fuel filter.
- P1143: Air control valve of the air-assisted injector – incorrect operation.
- P1144: Air control valve of the air-assisted injector – incorrect operation.
- P1145: Calculated torque error.
- P1147: Manifold air temperature sensor/intake air temperature sensor – correlation. Potential causes: Wiring, manifold air temperature sensor, intake air temperature sensor.
- P1148: Alternator 2 – control circuit. Potential causes: Wiring, alternator.
- P1149: Alternator 2, monitoring – high voltage. Potential causes: Wiring, alternator.
- P1150: Heated oxygen sensor – no switching, injection regulation at limit. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1151: Heated oxygen sensor – no switching, sensor indicates lean mixture. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1152: Heated oxygen sensor – no switching, sensor indicates rich mixture. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1153: Lean mixture for injection regulation – block 2. Potential causes: Fuel pressure, injectors, mass air flow sensor/manifold absolute pressure sensor, leak in intake system.
- P1154: Rich mixture for injection regulation – block 2. Potential causes: Fuel pressure, injectors, mass air flow sensor/manifold absolute pressure sensor, evaporative emissions system.
- P1155: Failure indicator activated by alternative fuel control module.
- P1156: Fuel selection switch – defective circuit. Potential causes: Wiring, fuel selection switch.
- P1157: Heated oxygen sensor 2, block 2 – activity not detected, lean mixture. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1158: Heated oxygen sensor 2, block 2 – activity not detected, rich mixture. Potential causes: Intake/fuel system, injectors, heated oxygen sensor, mass air flow sensor, engine coolant temperature sensor.
- P1159: Stepping motor of the fuel system. Potential causes: Wiring, stepping motor of the fuel system.
- P115A: Low fuel level – forced limited power mode. Potential cause: Low fuel level.
- P115B: Low fuel level – forced engine stop mode. Potential cause: Low fuel level.
- P115C: Transmission control module, operator error – forced engine stop mode. Potential cause: Transmission control module.
- P115D: Mass air flow sensor – circuit deviation. Potential causes: Wiring, mass air flow sensor.
- P115E: Throttle control unit – air flow adaptation upper limit reached. Potential causes: Wiring, throttle control unit.
- P1167: Invalid test – throttle not operated or operated too late.
- P1168: Fuel rail pressure sensor – operating problem/range. Potential causes: Wiring, fuel rail pressure sensor.
- P1169: Fuel rail pressure sensor – operating problem/range. Potential causes: Wiring, fuel rail pressure sensor.
- P116A: Stepping motor control of fuel system 1 – open circuit. Potential causes: Wiring, stepping motor control of fuel system.
- P116B: Stepping motor control of fuel system 1 – short circuit. Potential causes: Wiring, stepping motor control of fuel system.
- P116C: Stepping motor control of fuel system 2 – open circuit. Potential causes: Wiring, stepping motor control of fuel system.
- P116D: Stepping motor control of fuel system 2 – short circuit. Potential causes: Wiring, stepping motor control of fuel system.
- P116E: Fuel pressure relief system activated.
- P116F: Fuel flow control valve – control limit exceeded. Potential cause: Fuel flow control valve.
- P1170: Fuel cut-off solenoid. Potential causes: Wiring, fuel cut-off solenoid.
- P1171: Injection pump rotor position sensor. Potential causes: Wiring, injection pump rotor position sensor, engine control module.
- P1172: Injection pump rotor position sensor/fuel quantity regulator – excess fuel. Potential causes: Wiring, injection pump rotor position sensor, fuel quantity regulator, engine control module.
- P1173: Injection pump rotor position sensor. Potential causes: Wiring, injection pump rotor position sensor, engine control module.
- P1174: Injection pump cam ring position sensor. Potential causes: Wiring, injection pump rotor position sensor, engine control module.
- P1175: Injection timing solenoid. Potential causes: Wiring, restricted fuel supply, dirty fuel, injection timing solenoid, engine control module.
- P1176: Injection pump cam ring position sensor. Potential causes: Wiring, injection pump cam ring position sensor, engine control module.
- P1177: Injection pump position sensor. Potential causes: Wiring, injection pump position sensor, engine control module.
- P1178: Injection pump position sensor. Potential causes: Wiring, incorrect injection pump mounting, injection pump position sensor, engine control module.
- P117A: Engine oil, overheating – forced limited power mode. Potential causes: Wiring, engine oil temperature sensor, engine oil.
- P117B: Exhaust gas temperature sensor, block 1 – correlation. Potential causes: Wiring, exhaust gas temperature sensor.
- P117C: Exhaust gas temperature sensor, block 2 – correlation. Potential causes: Wiring, exhaust gas temperature sensor.
- P117D: Fuel flow control valve – control limit exceeded. Potential cause: Fuel flow control valve.
- P117E: Fuel flow control valve – control limit exceeded. Potential cause: Fuel flow control valve.
- P117F: Fuel pressure regulator control solenoid – control limit exceeded. Potential cause: Fuel pressure regulator control solenoid.
- P1180: Fuel supply system – low pressure. Potential causes: Blocked fuel filter, obstructed supply lines.
- P1181: Fuel supply system – high pressure. Potential cause: Fuel pressure regulator.
- P1182: Fuel cut-off solenoid – incorrect operation.
- P1183: Engine oil temperature sensor – defective circuit. Potential causes: Wiring, engine oil temperature sensor.
- P1184: Engine oil temperature sensor – out of self-diagnosis limits. Potential causes: Wiring, engine oil temperature sensor.
- P1185: Fuel pump temperature sensor – high voltage. Potential causes: Wiring, fuel pump temperature sensor.
- P1186: Fuel pump temperature sensor – low voltage. Potential causes: Wiring, fuel pump temperature sensor.
- P1187: Model variant selection. Potential cause: Incorrect engine control module coding.
- P1188: Calibration memory.
- P1189: Injection pump speed signal. Potential causes: Wiring, injection pump speed sensor, engine control module.
- P1190: Calibration resistance out of limits. Potential causes: Wiring, calibration resistance.
- P1191: Engine control relay. Potential causes: Wiring, engine control relay.
- P1192: Engine control relay. Potential causes: Wiring, engine control relay.
- P1193: Exhaust gas recirculation valve/solenoid, controller failure – defective circuit. Potential causes: Wiring, exhaust gas recirculation valve/solenoid, engine control module.
- P1194: Engine control module, analog/digital converter. Potential cause: Engine control module.
- P1195: Failure in data transmission. Potential cause: Engine control module.
- P1196: Engine control module – high supply voltage. Potential causes: Wiring, alternator.
- P1197: Engine control module – low supply voltage. Potential causes: Wiring, fuses, alternator, engine control relay.
- P1198: Injection pump rotor position sensor/fuel quantity regulator – insufficient fuel. Potential causes: Wiring, dirty fuel, blocked fuel filter, restricted fuel lines, injection pump rotor position sensor, fuel quantity regulator, engine control module.
- P1199: Fuel level sensor – low signal. Potential causes: Wiring, fuel level sensor.
- P1200: Injector – operating problem/circuit range. Potential causes: Wiring, injector, engine control module.
- P1201: Injector 1 – open circuit/short circuit. Potential causes: Wiring, injector, engine control module.
- P1202: Injector 2 – open circuit/short circuit. Potential causes: Wiring, injector, engine control module.
- P1203: Injector 3 – open circuit/short circuit. Potential causes: Wiring, injector, engine control module.
- P1204: Injector 4 – open circuit/short circuit. Potential causes: Wiring, injector, engine control module.
- P1205: Injector 5 – open circuit/short circuit. Potential causes: Wiring, injector.
- P1206: Injector 6 – open circuit/short circuit. Potential causes: Wiring, injector.
- P1209: Injector control pressure – anomaly in test. Potential causes: Wiring, injector, engine control module.
- P120A: Secondary fuel injector, block 1 – insufficient flow detected. Potential causes: Wiring, fuel injector, engine control module.
- P120B: Secondary fuel injector, block 1 – excessive flow detected. Potential causes: Wiring, fuel injector, engine control module.
- P120C: Secondary fuel injector, block 2 – insufficient flow detected. Potential causes: Wiring, fuel injector, engine control module.
- P120D: Secondary fuel injector, block 2 – excessive flow detected. Potential causes: Wiring, fuel injector, engine control module.
- P120E: Fuel pressure sensor, circuit A – excessive variation. Potential causes: Wiring, fuel pressure sensor.
- P120F: Fuel pressure regulator – excessive pressure variation.
- P1210: Injector control pressure higher than desired – engine off.
- P1211: Injector control pressure – high/low pressure. Potential causes: Wiring, injector, engine control module.
- P1212: Injector control pressure lower than desired – engine starting or running. Potential causes: Wiring, fuel pressure, low oil pressure, low oil level.
- P1213: Cold start injector – defective circuit. Potential causes: Wiring, cold start injector.
- P1214: Accelerator pedal position sensor B – intermittent circuit interruption. Potential causes: Wiring, accelerator pedal position sensor.
- P1215: Accelerator pedal position sensor C – low input signal in circuit. Potential causes: Wiring, accelerator pedal position sensor.
- P1216: Accelerator pedal position sensor C – high input signal in circuit. Potential causes: Wiring, accelerator pedal position sensor.
- P1217: Accelerator pedal position sensor C – intermittent circuit interruption. Potential causes: Wiring, accelerator pedal position sensor.
- P1218: Camshaft position sensor – high voltage. Potential causes: Wiring, camshaft position sensor.
- P1219: Camshaft position sensor – low voltage. Potential causes: Wiring, camshaft position sensor.
- P121A: Cylinder balance test – injector blocked. Potential cause: Injector.
- P121B: Cylinder balance test – injector blocked. Potential cause: Injector.
- P121C: Cylinder balance test – leak in injector. Potential cause: Injector.
- P1220: Throttle control system.
- P1221: Traction control system.
- P1222: Accelerator pedal position sensor B – low signal. Potential causes: Wiring, accelerator pedal position sensor.
- P1223: Accelerator pedal position sensor B – high signal. Potential causes: Wiring, accelerator pedal position sensor.
- P1224: Throttle position sensor B – out of self-diagnosis limits. Potential causes: Wiring, throttle position sensor.
- P1225: Injector needle lift sensor. Potential causes: Wiring, dirty fuel, air in fuel, injector needle lift sensor.
- P1226: Fuel quantity regulator position sensor – defective circuit. Potential causes: Wiring, fuel quantity regulator position sensor.
- P1227: Injection timing solenoid. Potential causes: Wiring, dirty fuel, air in fuel, injection timing solenoid.
- P1228: Vehicle speed regulator. Potential causes: Wiring, vehicle speed regulator.
- P1229: Injection timing solenoid. Potential causes: Wiring, dirty fuel, air in fuel, injection timing solenoid.
- P1230: Fuel pump, low speed. Potential causes: Wiring, fuel pump relay, fuel pump.
- P1231: Fuel pump, high speed. Potential causes: Wiring, fuel pump.
- P1232: Fuel pump, two speeds. Potential causes: Wiring, fuel pump.
- P1233: Fuel pump control module – control module disabled or disconnected. Potential causes: Wiring, fuel pump, engine control module.
- P1234: Fuel pump control module – control module disabled or disconnected. Potential causes: Wiring, fuel pump, engine control module.
- P1235: Fuel pump control – out of range. Potential causes: Wiring, fuel pump control module.
- P1236: Fuel pump control – out of range. Potential causes: Wiring, fuel pump control module.
- P1237: Fuel pump – defective circuit. Potential causes: Wiring, fuel pump control module.
- P1238: Fuel pump – defective circuit. Potential causes: Wiring, fuel pump, fuel pump control module.
- P1239: High-speed fuel pump, positive supply.
- P123A: Barometric pressure sensor, turbocharger/supercharger boost pressure sensor A – correlation. Potential causes: Wiring, barometric pressure sensor, turbocharger/supercharger boost pressure sensor.
- P123B: Barometric pressure sensor, turbocharger/supercharger boost pressure sensor B – correlation. Potential causes: Wiring, barometric pressure sensor, turbocharger/supercharger boost pressure sensor.
- P123C: Turbocharger system, low-temperature protection system activated – forced limited power mode.
- P1240: Sensor supply current. Potential causes: Wiring, engine control module.
- P1241: Sensor supply current – low input signal. Potential cause: Wiring.
- P1242: Sensor supply current – high input signal. Potential cause: Wiring.
- P1243: Secondary fuel pump – incorrect operation, ground circuit failure. Potential causes: Wiring, fuel pump.
- P1244: Alternator – high input signal. Potential causes: Wiring, alternator.
- P1245: Alternator – low input signal. Potential causes: Wiring, alternator.
- P1246: Alternator. Potential causes: Wiring, alternator.
- P1247: Low turbocharger boost pressure. Potential causes: Wiring, turbocharger wastegate actuator, turbocharger.
- P1248: Turbocharger boost pressure not detected. Potential causes: Wiring, turbocharger.
- P1249: Turbocharger wastegate – operating problem. Potential cause: Turbocharger.
- P1250: Fuel pressure regulator control solenoid. Potential causes: Wiring, fuel pressure regulator control solenoid.
- P1251: Air mixing solenoid – defective circuit. Potential causes: Wiring, injector.
- P1252: Accelerator pedal position sensor – signal correlation, high. Potential causes: Wiring, accelerator pedal position sensor.
- P1253: Accelerator pedal position sensor – signal correlation, low. Potential causes: Wiring, accelerator pedal position sensor.
- P1254: Accelerator pedal position sensor – signal correlation, high. Potential causes: Wiring, accelerator pedal position sensor.
- P1255: Accelerator pedal position sensor – signal correlation, low. Potential causes: Wiring, accelerator pedal position sensor.
- P1256: Accelerator pedal position sensor – signal correlation. Potential causes: Wiring, accelerator pedal position sensor.
- P1257: Accelerator pedal position sensor – signal correlation. Potential causes: Wiring, accelerator pedal position sensor.
- P1258: Accelerator pedal position sensor – signal correlation. Potential causes: Wiring, accelerator pedal position sensor.
- P1259: Immobilizer signal error to engine control module. Potential causes: Wiring, immobilizer control module.
- P1260: Theft detected – vehicle immobilized.
- P1261: Injector 1 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1262: Injector 2 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1263: Injector 3 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1264: Injector 4 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1265: Injector 5 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1266: Injector 6 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1267: Injector 7 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1268: Injector 8 – short circuit. Potential causes: Wiring, injector, engine control module.
- P1269: Immobilizer code not programmed. Potential cause: Wiring, immobilizer code not programmed.
- P126A: Injector 1 – defective input circuit. Potential causes: Wiring, injector, engine control module.
- P126B: Injector 2 – defective input circuit. Potential causes: Wiring, injector, engine control module.
- P126C: Injector 3 – defective input circuit. Potential causes: Wiring, injector, engine control module.
- P126D: Injector 4 – defective input circuit. Potential causes: Wiring, injector, engine control module.
