Dt1 Obd2 empowers you to diagnose and resolve car issues effectively. At OBD2-SCANNER.EDU.VN, we provide the knowledge and tools you need to understand diagnostic trouble codes. Let’s explore how to utilize this technology, focusing on common OBD2 codes and practical troubleshooting strategies for any vehicle problem.
Contents
- 1. What is DT1 OBD2 and Why Should You Care?
- 1.1 The Significance of OBD2 in Modern Vehicles
- 1.2 The Role of DT1 in Diagnostics
- 1.3 Benefits of Understanding OBD2 Systems
- 2. Essential Tools for Reading DT1 OBD2 Codes
- 2.1 OBD2 Scanners: Basic vs. Advanced
- 2.2 Smartphone Apps and Adapters
- 2.3 Multimeters and Other Diagnostic Equipment
- 3. A Comprehensive List of Generic OBD2 Codes (P0000 – P0999)
- 3.1 P0000 – P0099: Fuel and Air Metering Codes
- 3.2 P0100 – P0199: Injector Circuit and Air Flow Codes
- 3.3 P0200 – P0299: Injector Circuit and Fuel Delivery Codes
- 3.4 P0300 – P0399: Misfire and Ignition System Codes
- 3.5 P0400 – P0499: Emission Control System Codes
- 3.6 P0500 – P0599: Vehicle Speed and Idle Control Codes
- 3.7 P0600 – P0699: Computer and Output Circuit Codes
- 3.8 P0700 – P0799: Transmission Codes
- 3.9 P0800 – P0899: Transmission and Driveline Codes
- 3.10 P0900 – P0999: Transmission and Driveline Continued Codes
1. What is DT1 OBD2 and Why Should You Care?
DT1 OBD2 refers to Diagnostic Trouble Code 1 within the On-Board Diagnostics II (OBD2) system. The OBD2 system is a standardized system used in most vehicles manufactured after 1996 to monitor engine performance and identify potential issues. Think of it as your car’s built-in health monitor.
1.1 The Significance of OBD2 in Modern Vehicles
OBD2 is crucial in today’s cars for several reasons:
- Emission Control: Monitors components affecting emissions, ensuring environmental compliance.
- Early Issue Detection: Identifies problems early, preventing costly repairs.
- Standardization: Provides a universal diagnostic language for all vehicles, simplifying repairs.
According to the Environmental Protection Agency (EPA), OBD2 systems have significantly reduced vehicle emissions since their introduction.
1.2 The Role of DT1 in Diagnostics
DT1, as a part of OBD2, specifically refers to the first diagnostic trouble code detected by the system. Understanding DT1 can provide you with the initial clue to diagnose car problems, guiding you through the repair process.
1.3 Benefits of Understanding OBD2 Systems
- Cost Savings: Diagnose and fix minor issues yourself, avoiding expensive mechanic visits.
- Informed Decisions: Understand the problem before taking your car to a mechanic, preventing unnecessary repairs.
- Preventative Maintenance: Identify potential issues early, extending the life of your vehicle.
2. Essential Tools for Reading DT1 OBD2 Codes
To read DT1 OBD2 codes, you’ll need a few essential tools. Here’s what you should consider:
2.1 OBD2 Scanners: Basic vs. Advanced
- Basic Scanners: Read and clear diagnostic trouble codes. These are affordable and suitable for simple diagnostics.
- Advanced Scanners: Offer additional features like live data streaming, freeze frame data, and vehicle-specific diagnostics.
For example, a basic scanner might cost around $30-$50, while an advanced scanner can range from $100 to several hundred dollars.
2.2 Smartphone Apps and Adapters
Smartphone apps, combined with an OBD2 adapter, provide a convenient way to read codes. Popular apps include Torque Pro, OBD Fusion, and Carista.
Benefits:
- Portability
- User-friendly interface
- Cost-effective (adapters usually range from $20-$50)
2.3 Multimeters and Other Diagnostic Equipment
While not always necessary for reading codes, multimeters can help diagnose electrical issues related to OBD2 codes. Other useful tools include:
- Wiring Diagrams: Essential for tracing circuits.
- Scan Tool Manuals: Provide specific information about your scan tool’s features.
- OBD2 Code Databases: Help understand the meaning of specific codes.
3. A Comprehensive List of Generic OBD2 Codes (P0000 – P0999)
Understanding common OBD2 codes is essential for effective vehicle diagnostics. Here’s an extensive list covering generic codes from P0000 to P0999:
3.1 P0000 – P0099: Fuel and Air Metering Codes
These codes relate to issues with the fuel and air mixture in the engine.
| Code | Description | Possible Causes |
|---|---|---|
| P0010 | ‘A’ Camshaft Position Actuator Circuit (Bank 1) | Faulty camshaft actuator, wiring issues, or PCM failure. |
| P0011 | ‘A’ Camshaft Position – Timing Over-Advanced or System Performance (Bank 1) | Low oil level, faulty camshaft actuator, or timing chain issues. |
| P0012 | ‘A’ Camshaft Position – Timing Over-Retarded (Bank 1) | Faulty camshaft actuator, low oil pressure, or timing chain issues. |
| P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) | Faulty oxygen sensor, wiring issues, or PCM failure. |
| P0031 | HO2S Heater Control Circuit Low (Bank 1 Sensor 1) | Faulty oxygen sensor, shorted wiring, or PCM issue. |
| P0032 | HO2S Heater Control Circuit High (Bank 1 Sensor 1) | Open circuit in the heater control, faulty oxygen sensor, or PCM issue. |
| P0070 | Ambient Air Temperature Sensor Circuit | Faulty ambient air temperature sensor, wiring issues, or PCM failure. |
| P0071 | Ambient Air Temperature Sensor Range/Performance | Faulty sensor, poor connection, or PCM issue. |
| P0072 | Ambient Air Temperature Sensor Circuit Low Input | Shorted wiring, faulty sensor, or PCM issue. |
| P0073 | Ambient Air Temperature Sensor Circuit High Input | Open circuit, faulty sensor, or PCM issue. |
3.2 P0100 – P0199: Injector Circuit and Air Flow Codes
These codes are related to the mass air flow sensor, intake air temperature sensor, and oxygen sensors.
| Code | Description | Possible Causes |
|---|---|---|
| P0100 | Mass or Volume Air Flow Circuit | Dirty or faulty MAF sensor, wiring issues, or PCM failure. |
| P0101 | Mass or Volume Air Flow Circuit Range/Performance Problem | Vacuum leaks, dirty MAF sensor, or restricted air intake. |
| P0102 | Mass or Volume Air Flow Circuit Low Input | Faulty MAF sensor, wiring issues, or vacuum leaks. |
| P0103 | Mass or Volume Air Flow Circuit High Input | Faulty MAF sensor, wiring issues, or PCM failure. |
| P0110 | Intake Air Temperature Circuit | Faulty IAT sensor, wiring issues, or PCM failure. |
| P0111 | Intake Air Temperature Circuit Range/Performance Problem | Faulty IAT sensor, poor connection, or PCM issue. |
| P0112 | Intake Air Temperature Circuit Low Input | Shorted wiring, faulty IAT sensor, or PCM issue. |
| P0113 | Intake Air Temperature Circuit High Input | Open circuit, faulty IAT sensor, or PCM issue. |
| P0116 | Engine Coolant Temperature Circuit Range/Performance Problem | Low coolant level, faulty thermostat, or faulty ECT sensor. |
| P0117 | Engine Coolant Temperature Circuit Low Input | Shorted wiring, faulty ECT sensor, or PCM issue. |
| P0118 | Engine Coolant Temperature Circuit High Input | Open circuit, faulty ECT sensor, or PCM issue. |
| P0120 | Throttle/Pedal Position Sensor/Switch A Circuit | Faulty TPS, wiring issues, or PCM failure. |
| P0121 | Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem | Misadjusted TPS, vacuum leaks, or throttle body issues. |
| P0122 | Throttle/Pedal Position Sensor/Switch A Circuit Low Input | Shorted wiring, faulty TPS, or PCM issue. |
| P0123 | Throttle/Pedal Position Sensor/Switch A Circuit High Input | Open circuit, faulty TPS, or PCM issue. |
| P0130 | O2 Sensor Circuit (Bank 1 Sensor 1) | Faulty oxygen sensor, exhaust leaks, or wiring issues. |
| P0131 | O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1) | Exhaust leaks, faulty O2 sensor, or wiring issues. |
| P0132 | O2 Sensor Circuit High Voltage (Bank 1 Sensor 1) | Fuel pressure issues, faulty O2 sensor, or wiring issues. |
| P0133 | O2 Sensor Circuit Slow Response (Bank 1 Sensor 1) | Aging O2 sensor, exhaust leaks, or wiring issues. |
| P0134 | O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) | Faulty O2 sensor, wiring issues, or exhaust leaks. |
| P0135 | O2 Sensor Heater Circuit (Bank 1 Sensor 1) | Faulty oxygen sensor, wiring issues, or PCM failure. |
| P0170 | Fuel Trim (Bank 1) | Vacuum leaks, faulty O2 sensor, or MAF sensor issues. |
| P0171 | System too Lean (Bank 1) | Vacuum leaks, dirty MAF sensor, or low fuel pressure. |
| P0172 | System too Rich (Bank 1) | Faulty O2 sensor, high fuel pressure, or leaky injectors. |
| P0174 | System too Lean (Bank 2) | Vacuum leaks, dirty MAF sensor, or low fuel pressure. |
| P0175 | System too Rich (Bank 2) | Faulty O2 sensor, high fuel pressure, or leaky injectors. |
3.3 P0200 – P0299: Injector Circuit and Fuel Delivery Codes
These codes relate to the fuel injectors and overall fuel delivery system.
| Code | Description | Possible Causes |
|---|---|---|
| P0200 | Injector Circuit | Faulty injector, wiring issues, or PCM failure. |
| P0201 | Injector Circuit – Cylinder 1 | Faulty injector, wiring issues, or PCM failure. |
| P0202 | Injector Circuit – Cylinder 2 | Faulty injector, wiring issues, or PCM failure. |
| P0203 | Injector Circuit – Cylinder 3 | Faulty injector, wiring issues, or PCM failure. |
| P0204 | Injector Circuit – Cylinder 4 | Faulty injector, wiring issues, or PCM failure. |
| P0230 | Fuel Pump Primary Circuit | Faulty fuel pump relay, wiring issues, or PCM failure. |
| P0231 | Fuel Pump Secondary Circuit Low | Shorted wiring, faulty fuel pump, or PCM issue. |
| P0232 | Fuel Pump Secondary Circuit High | Open circuit, faulty fuel pump, or PCM issue. |
| P0234 | Turbo/Super Charger Overboost Condition | Faulty boost sensor, wastegate issues, or PCM failure. |
| P0235 | Turbo/Super Charger Boost Sensor ‘A’ Circuit | Faulty boost sensor, wiring issues, or PCM failure. |
| P0236 | Turbo/Super Charger Boost Sensor ‘A’ Circuit Range/Performance | Vacuum leaks, faulty boost sensor, or wiring issues. |
| P0237 | Turbo/Super Charger Boost Sensor ‘A’ Circuit Low | Shorted wiring, faulty boost sensor, or PCM issue. |
| P0238 | Turbo/Super Charger Boost Sensor ‘A’ Circuit High | Open circuit, faulty boost sensor, or PCM issue. |
3.4 P0300 – P0399: Misfire and Ignition System Codes
These codes indicate issues with engine misfires and the ignition system.
| Code | Description | Possible Causes |
|---|---|---|
| P0300 | Random/Multiple Cylinder Misfire Detected | Faulty spark plugs, ignition coils, vacuum leaks, or low fuel pressure. |
| P0301 | Cylinder 1 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, or low compression in cylinder 1. |
| P0302 | Cylinder 2 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, or low compression in cylinder 2. |
| P0303 | Cylinder 3 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, or low compression in cylinder 3. |
| P0304 | Cylinder 4 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, or low compression in cylinder 4. |
| P0320 | Ignition/Distributor Engine Speed Input Circuit | Faulty crankshaft position sensor, wiring issues, or PCM failure. |
| P0321 | Ignition/Distributor Engine Speed Input Circuit Range/Performance | Faulty crankshaft position sensor, wiring issues, or PCM failure. |
| P0322 | Ignition/Distributor Engine Speed Input Circuit No Signal | Faulty crankshaft position sensor, wiring issues, or PCM failure. |
| P0325 | Knock Sensor 1 Circuit (Bank 1 or Single Sensor) | Faulty knock sensor, wiring issues, or PCM failure. |
| P0326 | Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor) | Faulty knock sensor, wiring issues, or PCM failure. |
| P0327 | Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) | Shorted wiring, faulty knock sensor, or PCM issue. |
| P0328 | Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor) | Open circuit, faulty knock sensor, or PCM issue. |
| P0335 | Crankshaft Position Sensor A Circuit | Faulty crankshaft position sensor, wiring issues, or PCM failure. |
| P0336 | Crankshaft Position Sensor A Circuit Range/Performance | Faulty crankshaft position sensor, wiring issues, or PCM failure. |
| P0337 | Crankshaft Position Sensor A Circuit Low Input | Shorted wiring, faulty crankshaft position sensor, or PCM issue. |
| P0338 | Crankshaft Position Sensor A Circuit High Input | Open circuit, faulty crankshaft position sensor, or PCM issue. |
| P0340 | Camshaft Position Sensor ‘A’ Circuit (Bank 1 or Single Sensor) | Faulty camshaft position sensor, wiring issues, or PCM failure. |
| P0341 | Camshaft Position Sensor ‘A’ Circuit Range/Performance (Bank 1 or Single Sensor) | Faulty camshaft position sensor, timing chain issues, or PCM failure. |
| P0342 | Camshaft Position Sensor ‘A’ Circuit Low Input (Bank 1 or Single Sensor) | Shorted wiring, faulty camshaft position sensor, or PCM issue. |
| P0343 | Camshaft Position Sensor ‘A’ Circuit High Input (Bank 1 or Single Sensor) | Open circuit, faulty camshaft position sensor, or PCM issue. |
| P0351 | Ignition Coil ‘A’ Primary/Secondary Circuit | Faulty ignition coil, wiring issues, or PCM failure. |
| P0352 | Ignition Coil ‘B’ Primary/Secondary Circuit | Faulty ignition coil, wiring issues, or PCM failure. |
3.5 P0400 – P0499: Emission Control System Codes
These codes are related to the vehicle’s emission control systems, like the EGR and EVAP systems.
| Code | Description | Possible Causes |
|---|---|---|
| P0400 | Exhaust Gas Recirculation Flow | Blocked EGR valve, vacuum leaks, or faulty EGR solenoid. |
| P0401 | Exhaust Gas Recirculation Flow Insufficient Detected | Blocked EGR valve, vacuum leaks, or faulty EGR solenoid. |
| P0402 | Exhaust Gas Recirculation Flow Excessive Detected | Faulty EGR valve, vacuum leaks, or faulty EGR solenoid. |
| P0403 | Exhaust Gas Recirculation Control Circuit | Faulty EGR valve, wiring issues, or PCM failure. |
| P0410 | Secondary Air Injection System | Faulty air pump, vacuum leaks, or faulty check valve. |
| P0411 | Secondary Air Injection System Incorrect Flow Detected | Faulty air pump, vacuum leaks, or faulty check valve. |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) | Faulty catalytic converter, exhaust leaks, or faulty O2 sensors. |
| P0430 | Catalyst System Efficiency Below Threshold (Bank 2) | Faulty catalytic converter, exhaust leaks, or faulty O2 sensors. |
| P0440 | Evaporative Emission Control System | Leaky fuel cap, vacuum leaks, or faulty EVAP solenoid. |
| P0441 | Evaporative Emission Control System Incorrect Purge Flow | Faulty EVAP solenoid, vacuum leaks, or blocked EVAP canister. |
| P0442 | Evaporative Emission Control System Leak Detected (small leak) | Leaky fuel cap, vacuum leaks, or faulty EVAP components. |
| P0446 | Evaporative Emission Control System Vent Control Circuit | Faulty EVAP vent valve, wiring issues, or PCM failure. |
| P0455 | Evaporative Emission Control System Leak Detected (gross leak) | Missing or loose fuel cap, large vacuum leaks, or faulty EVAP components. |
| P0456 | Evaporative Emission Control System Leak Detected (very small leak) | Leaky fuel cap, small vacuum leaks, or faulty EVAP components. |
| P0457 | Evaporative Emission Control System Leak Detected (fuel cap loose/off) | Missing or loose fuel cap. |
| P0460 | Fuel Level Sensor Circuit | Faulty fuel level sensor, wiring issues, or PCM failure. |
3.6 P0500 – P0599: Vehicle Speed and Idle Control Codes
These codes are related to vehicle speed sensors, idle control systems, and other speed-related components.
| Code | Description | Possible Causes |
|---|---|---|
| P0500 | Vehicle Speed Sensor | Faulty VSS, wiring issues, or PCM failure. |
| P0501 | Vehicle Speed Sensor Range/Performance | Faulty VSS, wiring issues, or PCM failure. |
| P0502 | Vehicle Speed Sensor Circuit Low Input | Shorted wiring, faulty VSS, or PCM issue. |
| P0503 | Vehicle Speed Sensor Intermittent/Erratic/High | Faulty VSS, wiring issues, or PCM issue. |
| P0505 | Idle Control System | Dirty throttle body, faulty IAC valve, or vacuum leaks. |
| P0506 | Idle Control System RPM Lower Than Expected | Vacuum leaks, faulty IAC valve, or PCM issue. |
| P0507 | Idle Control System RPM Higher Than Expected | Vacuum leaks, faulty IAC valve, or PCM issue. |
| P0508 | Idle Control System Circuit Low | Shorted wiring, faulty IAC valve, or PCM issue. |
| P0509 | Idle Control System Circuit High | Open circuit, faulty IAC valve, or PCM issue. |
| P0560 | System Voltage | Faulty alternator, battery issues, or wiring problems. |
| P0561 | System Voltage Unstable | Faulty alternator, battery issues, or wiring problems. |
| P0562 | System Voltage Low | Faulty alternator, battery issues, or wiring problems. |
| P0563 | System Voltage High | Faulty alternator, voltage regulator issues, or wiring problems. |
3.7 P0600 – P0699: Computer and Output Circuit Codes
These codes indicate issues with the vehicle’s computer (PCM) and output circuits.
| Code | Description | Possible Causes |
|---|---|---|
| P0600 | Serial Communication Link | Wiring issues, faulty PCM, or communication module failure. |
| P0601 | Internal Control Module Memory Check Sum Error | Faulty PCM, corrupted memory, or programming issues. |
| P0602 | Control Module Programming Error | Incorrect programming, PCM failure, or corrupted software. |
| P0603 | Internal Control Module Keep Alive Memory (KAM) Error | Faulty PCM, battery issues, or wiring problems. |
| P0604 | Internal Control Module Random Access Memory (RAM) Error | Faulty PCM, corrupted RAM, or internal failure. |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | Faulty PCM, corrupted ROM, or internal failure. |
| P0606 | ECM/PCM Processor | Faulty PCM, internal processor failure, or corrupted software. |
| P0607 | Control Module Performance | Faulty PCM, sensor issues, or wiring problems. |
| P0620 | Generator Control Circuit | Faulty alternator, wiring issues, or PCM failure. |
| P0621 | Generator Lamp ‘L’ Terminal Control Circuit | Faulty alternator, wiring issues, or PCM failure. |
| P0622 | Generator Field ‘F’ Terminal Control Circuit | Faulty alternator, wiring issues, or PCM failure. |
| P0650 | Malfunction Indicator Lamp (MIL) Control Circuit | Faulty PCM, wiring issues, or bulb failure. |
| P0660 | Intake Manifold Tuning Valve Control Circuit (Bank 1) | Faulty IMTV, wiring issues, or PCM failure. |
| P0661 | Intake Manifold Tuning Valve Control Circuit Low (Bank 1) | Shorted wiring, faulty IMTV, or PCM issue. |
| P0662 | Intake Manifold Tuning Valve Control Circuit High (Bank 1) | Open circuit, faulty IMTV, or PCM issue. |
3.8 P0700 – P0799: Transmission Codes
These codes relate to the transmission system, including issues with solenoids, sensors, and gear ratios.
| Code | Description | Possible Causes |
|---|---|---|
| P0700 | Transmission Control System (MIL Request) | Faulty transmission, sensor issues, or wiring problems. |
| P0701 | Transmission Control System Range/Performance | Faulty transmission, sensor issues, or wiring problems. |
| P0702 | Transmission Control System Electrical | Wiring issues, sensor problems, or internal transmission failure. |
| P0703 | Torque Converter/Brake Switch B Circuit | Faulty brake switch, wiring issues, or PCM failure. |
| P0704 | Clutch Switch Input Circuit Malfunction | Faulty clutch switch, wiring issues, or PCM failure. |
| P0705 | Transmission Range Sensor Circuit Malfunction (PRNDL Input) | Faulty TRS, wiring issues, or PCM failure. |
| P0706 | Transmission Range Sensor Circuit Range/Performance | Misadjusted TRS, wiring issues, or PCM failure. |
| P0707 | Transmission Range Sensor Circuit Low Input | Shorted wiring, faulty TRS, or PCM issue. |
| P0708 | Transmission Range Sensor Circuit High Input | Open circuit, faulty TRS, or PCM issue. |
| P0710 | Transmission Fluid Temperature Sensor Circuit | Faulty TFT sensor, wiring issues, or PCM failure. |
| P0711 | Transmission Fluid Temperature Sensor Circuit Range/Performance | Faulty TFT sensor, wiring issues, or PCM failure. |
| P0712 | Transmission Fluid Temperature Sensor Circuit Low Input | Shorted wiring, faulty TFT sensor, or PCM issue. |
| P0713 | Transmission Fluid Temperature Sensor Circuit High Input | Open circuit, faulty TFT sensor, or PCM issue. |
| P0715 | Input/Turbine Speed Sensor Circuit | Faulty input speed sensor, wiring issues, or PCM failure. |
| P0716 | Input/Turbine Speed Sensor Circuit Range/Performance | Faulty input speed sensor, wiring issues, or PCM failure. |
| P0717 | Input/Turbine Speed Sensor Circuit No Signal | Faulty input speed sensor, wiring issues, or PCM failure. |
| P0720 | Output Speed Sensor Circuit | Faulty output speed sensor, wiring issues, or PCM failure. |
| P0721 | Output Speed Sensor Circuit Range/Performance | Faulty output speed sensor, wiring issues, or PCM failure. |
| P0722 | Output Speed Sensor Circuit No Signal | Faulty output speed sensor, wiring issues, or PCM failure. |
| P0740 | Torque Converter Clutch Circuit | Faulty TCC solenoid, wiring issues, or PCM failure. |
| P0741 | Torque Converter Clutch Circuit Performance or Stuck Off | Faulty TCC solenoid, wiring issues, or PCM failure. |
| P0742 | Torque Converter Clutch Circuit Stuck On | Faulty TCC solenoid, wiring issues, or PCM failure. |
| P0743 | Torque Converter Clutch Circuit Electrical | Wiring issues, faulty TCC solenoid, or PCM failure. |
| P0750 | Shift Solenoid ‘A’ | Faulty shift solenoid, wiring issues, or PCM failure. |
| P0751 | Shift Solenoid ‘A’ Performance or Stuck Off | Faulty shift solenoid, wiring issues, or PCM failure. |
| P0752 | Shift Solenoid ‘A’ Stuck On | Faulty shift solenoid, wiring issues, or PCM failure. |
| P0753 | Shift Solenoid ‘A’ Electrical | Wiring issues, faulty shift solenoid, or PCM failure. |
3.9 P0800 – P0899: Transmission and Driveline Codes
These codes cover additional transmission and driveline issues, including clutch and gear selector problems.
| Code | Description | Possible Causes |
|---|---|---|
| P0801 | Reverse Inhibit Control Circuit | Faulty solenoid, wiring issues, or PCM failure. |
| P0803 | 1-4 Upshift (Skip Shift) Solenoid Control Circuit | Faulty solenoid, wiring issues, or PCM failure. |
| P0804 | 1-4 Upshift (Skip Shift) Lamp Control Circuit | Faulty bulb, wiring issues, or PCM failure. |
| P0805 | Clutch Position Sensor Circuit | Faulty sensor, wiring issues, or PCM failure. |
| P0806 | Clutch Position Sensor Circuit Range/Performance | Misadjusted sensor, wiring issues, or PCM failure. |
| P0807 | Clutch Position Sensor Circuit Low | Shorted wiring, faulty sensor, or PCM issue. |
| P0808 | Clutch Position Sensor Circuit High | Open circuit, faulty sensor, or PCM issue. |
| P0810 | Clutch Position Control Error | Faulty clutch, sensor issues, or PCM failure. |
| P0811 | Excessive Clutch Slippage | Worn clutch, hydraulic issues, or PCM failure. |
| P0812 | Reverse Input Circuit | Wiring issues, faulty switch, or PCM failure. |
| P0813 | Reverse Output Circuit | Wiring issues, faulty relay, or PCM failure. |
| P0814 | Transmission Range Display Circuit | Wiring issues, faulty display, or PCM failure. |
| P0815 | Upshift Switch Circuit | Faulty switch, wiring issues, or PCM failure. |
| P0816 | Downshift Switch Circuit | Faulty switch, wiring issues, or PCM failure. |
| P0817 | Starter Disable Circuit | Wiring issues, faulty relay, or PCM failure. |
| P0820 | Gear Lever X-Y Position Sensor Circuit | Faulty sensor, wiring issues, or PCM failure. |
| P0821 | Gear Lever X Position Circuit | Faulty sensor, wiring issues, or PCM failure. |
| P0822 | Gear Lever Y Position Circuit | Faulty sensor, wiring issues, or PCM failure. |
| P0825 | Gear Lever Push-Pull Switch (Shift Anticipate) | Faulty switch, wiring issues, or PCM failure. |
| P0830 | Clutch Pedal Switch ‘A’ Circuit | Faulty switch, wiring issues, or PCM failure. |
| P0831 | Clutch Pedal Switch ‘A’ Circuit Low | Shorted wiring, faulty switch, or PCM issue. |
| P0832 | Clutch Pedal Switch ‘A’ Circuit High | Open circuit, faulty switch, or PCM issue. |
| P0836 | Four Wheel Drive (4WD) Switch Circuit | Faulty switch, wiring issues, or PCM failure. |
| P0837 | Four Wheel Drive (4WD) Switch Circuit Range/Performance | Misadjusted switch, wiring issues, or PCM failure. |
| P0838 | Four Wheel Drive (4WD) Switch Circuit Low | Shorted wiring, faulty switch, or PCM issue. |
| P0839 | Four Wheel Drive (4WD) Switch Circuit High | Open circuit, faulty switch, or PCM issue. |
| P0840 | Transmission Fluid Pressure Sensor/Switch ‘A’ Circuit | Faulty sensor, wiring issues, or PCM failure. |
| P0841 | Transmission Fluid Pressure Sensor/Switch ‘A’ Circuit Range/Performance | Misadjusted sensor, wiring issues, or PCM failure. |
| P0842 | Transmission Fluid Pressure Sensor/Switch ‘A’ Circuit Low | Shorted wiring, faulty sensor, or PCM issue. |
| P0843 | Transmission Fluid Pressure Sensor/Switch ‘A’ Circuit High | Open circuit, faulty sensor, or PCM issue. |
| P0850 | Park/Neutral Switch Input Circuit | Faulty switch, wiring issues, or PCM failure. |
| P0851 | Park/Neutral Switch Input Circuit Low | Shorted wiring, faulty switch, or PCM issue. |
| P0852 | Park/Neutral Switch Input Circuit High | Open circuit, faulty switch, or PCM issue. |
| P0860 | Gear Shift Module Communication Circuit | Wiring issues, faulty module, or PCM failure. |
| P0861 | Gear Shift Module Communication Circuit Low | Shorted wiring, faulty module, or PCM issue. |
| P0862 | Gear Shift Module Communication Circuit High | Open circuit, faulty module, or PCM issue. |
| P0880 | TCM Power Input Signal | Wiring issues, faulty relay, or PCM failure. |
| P0881 | TCM Power Input Signal Range/Performance | Misadjusted relay, wiring issues, or PCM failure. |
| P0882 | TCM Power Input Signal Low | Shorted wiring, faulty relay, or PCM issue. |
| P0883 | TCM Power Input Signal High | Open circuit, faulty relay, or PCM issue. |
| P0893 | Multiple Gears Engaged | Internal transmission failure, hydraulic issues, or PCM failure. |
| P0894 | Transmission Component Slipping | Worn clutches, hydraulic issues, or PCM failure. |
3.10 P0900 – P0999: Transmission and Driveline Continued Codes
These codes continue to address transmission and driveline concerns, focusing on actuator circuits and pressure control solenoids.
| Code | Description | Possible Causes |
|---|---|---|
| P0900 | Clutch Actuator Circuit/Open | Faulty actuator, wiring issues, or PCM failure. |
| P0901 | Clutch Actuator Circuit Range/Performance | Misadjusted actuator, wiring issues, or PCM failure. |
| P0902 | Clutch Actuator Circuit Low | Shorted wiring, faulty actuator, or PCM issue. |
| P0903 | Clutch Actuator Circuit High | Open circuit, faulty actuator, or PCM issue. |
| P0904 | Gate Select Position Circuit | Faulty sensor, wiring issues, or PCM failure. |
| P0905 | Gate Select Position Circuit Range/Performance | Misadjusted sensor, wiring issues, or PCM failure. |
| P0906 | Gate Select Position Circuit Low | Shorted wiring, faulty sensor, or PCM issue. |
| P0907 | Gate Select Position Circuit High | Open circuit, faulty sensor, or PCM issue. |
| P0910 | Gate Select Actuator Circuit/Open | Faulty actuator, wiring issues, or PCM failure. |
| P0911 | Gate Select Actuator Circuit Range/Performance | Misadjusted actuator, wiring issues, or PCM failure. |
| P0912 | Gate Select Actuator Circuit Low | Shorted wiring, faulty actuator, or PCM issue. |
| P0913 | Gate Select Actuator Circuit High | Open circuit, faulty actuator, or PCM issue. |
| P0920 | Gear Shift Forward Actuator Circuit/Open | Faulty actuator, wiring issues, or PCM failure. |
| P0921 | Gear Shift Forward Actuator Circuit Range/Performance | Misadjusted actuator, wiring issues, or PCM failure. |
| P0922 | Gear Shift Forward Actuator Circuit Low | Shorted wiring, faulty actuator, or PCM issue. |
| P0923 | Gear Shift Forward Actuator Circuit High | Open circuit, faulty actuator, or PCM issue. |
| P0924 | Gear Shift Reverse Act |
