What Is The Best AVH-W4400NEX OBD2 Harness For Car Upgrades?

The Avh-w4400nex Obd2 Harness is a crucial component when upgrading your car’s head unit, offering seamless integration with vehicle systems for enhanced functionality, and at OBD2-SCANNER.EDU.VN, we provide expert guidance to ensure a smooth installation process. Understanding its compatibility and proper installation can significantly improve your vehicle’s entertainment and diagnostic capabilities. Let’s explore integrating your car’s computer with your new head unit to enhance both functionality and diagnostics.

1. What Is An AVH-W4400NEX OBD2 Harness And Why Do You Need It?

An AVH-W4400NEX OBD2 harness is an essential adapter that bridges the connection between the Pioneer AVH-W4400NEX head unit and your car’s On-Board Diagnostics II (OBD2) system. It enables the head unit to access and display vital vehicle information, such as engine diagnostics, performance data, and other system parameters, right on the screen. This integration provides a comprehensive overview of your car’s health and performance, enhancing both the entertainment and diagnostic capabilities of your vehicle.

• Enhanced Vehicle Monitoring: With the OBD2 harness, you can monitor real-time data, including engine temperature, RPM, and fuel efficiency, directly on your AVH-W4400NEX display.
• Diagnostic Capabilities: The harness allows your head unit to read and display OBD2 error codes, enabling you to quickly identify and address potential issues.
• Seamless Integration: Designed specifically for the AVH-W4400NEX, the harness ensures a hassle-free installation and perfect compatibility, maintaining the integrity of your vehicle’s systems.
• Improved User Experience: By integrating vehicle data into your head unit, you gain a more informed and connected driving experience, making it easier to stay on top of your car’s condition.

2. Key Features To Look For In An AVH-W4400NEX OBD2 Harness

When selecting an AVH-W4400NEX OBD2 harness, prioritize features that ensure seamless integration, reliability, and access to comprehensive vehicle data. High-quality materials, compatibility, and ease of installation are crucial for optimal performance. Here are the key features to consider:

• Compatibility: Ensure the harness is specifically designed for the Pioneer AVH-W4400NEX head unit to guarantee seamless integration and avoid any compatibility issues.
• Data Accessibility: Verify that the harness supports a wide range of OBD2 data, including engine temperature, RPM, fuel efficiency, and diagnostic trouble codes (DTCs).
• Build Quality: Look for a harness made from high-quality materials that can withstand the harsh conditions of the car environment, such as temperature fluctuations and vibrations.
• Easy Installation: Opt for a harness that comes with clear instructions and requires minimal wiring to simplify the installation process.
• Real-Time Monitoring: Check if the harness provides real-time data updates, allowing you to monitor your vehicle’s performance and health in real-time.
• Error Code Reading: Ensure the harness can accurately read and display OBD2 error codes, helping you identify and address potential issues quickly.
• Firmware Updates: Some harnesses support firmware updates, which can improve compatibility and add new features over time.
• Warranty: A good warranty indicates the manufacturer’s confidence in their product and protects you against potential defects.
• User Reviews: Read reviews from other users to get an idea of the harness’s performance, reliability, and ease of installation.
• Technical Support: Check if the manufacturer offers technical support to assist you with any installation or compatibility issues.

By focusing on these key features, you can select an AVH-W4400NEX OBD2 harness that provides seamless integration, reliable performance, and comprehensive vehicle data access, enhancing your overall driving experience.

3. Step-By-Step Guide: Installing Your AVH-W4400NEX OBD2 Harness

Installing an AVH-W4400NEX OBD2 harness can significantly enhance your car’s functionality by integrating vehicle diagnostics with your head unit. Follow this detailed step-by-step guide to ensure a smooth and successful installation.

Step 1: Gather Necessary Tools and Materials

Before starting, ensure you have all the necessary tools and materials:

• AVH-W4400NEX OBD2 harness
• Pioneer AVH-W4400NEX head unit
• OBD2 scanner (optional, for testing)
• Screwdrivers (Phillips and flathead)
• Wire stripper
• Wire crimper
• Butt connectors or solder
• Electrical tape
• Dashboard removal tools
• Multimeter (optional, for testing)
• Wiring diagram for your car model

Step 2: Disconnect the Battery

To prevent electrical shock and protect your car’s electrical system, disconnect the negative terminal of your car battery.

1. Locate the negative terminal on your car battery (marked with a “-” symbol).
2. Use a wrench to loosen the nut on the negative terminal.
3. Carefully remove the cable from the terminal and secure it away from the battery.

Step 3: Remove the Old Head Unit

1. Use dashboard removal tools to gently pry off the trim around the existing head unit.
2. Remove the screws holding the head unit in place.
3. Carefully pull the head unit out of the dashboard.
4. Disconnect all wiring harnesses and the antenna cable from the old head unit.

Step 4: Prepare the AVH-W4400NEX Head Unit

1. Connect the AVH-W4400NEX head unit to the appropriate wiring harness adapter.
2. Refer to the wiring diagram for your car model and the AVH-W4400NEX to match the wires correctly.
3. Use butt connectors or solder to connect the wires, ensuring each connection is secure.
4. Wrap each connection with electrical tape to prevent shorts.

Step 5: Connect the OBD2 Harness

1. Locate the OBD2 port in your car (usually under the dashboard on the driver’s side).
2. Connect the OBD2 harness to the OBD2 port.
3. Connect the other end of the OBD2 harness to the AVH-W4400NEX wiring harness.
4. Ensure all connections are secure and properly insulated.

Step 6: Test the Connections

Before reinstalling the head unit, test the connections to ensure everything is working correctly.

1. Reconnect the negative terminal of the car battery.
2. Turn on the ignition and power on the AVH-W4400NEX head unit.
3. Check if the head unit displays vehicle data from the OBD2 system.
4. Test all functions of the head unit, including audio, display, and any other connected devices.
5. If everything works correctly, proceed to the next step. If not, double-check all wiring connections and consult the wiring diagrams.

Step 7: Reinstall the Head Unit

1. Carefully slide the AVH-W4400NEX head unit into the dashboard.
2. Secure the head unit with the screws you removed earlier.
3. Reattach the trim around the head unit, ensuring it is properly aligned.

Step 8: Final Testing

1. Turn on the ignition and power on the AVH-W4400NEX head unit again.
2. Verify that all functions are working as expected, including OBD2 data display.
3. Take your car for a short drive to ensure everything is functioning correctly under normal driving conditions.

By following these steps, you can successfully install an AVH-W4400NEX OBD2 harness and enjoy enhanced vehicle monitoring and diagnostic capabilities. For any further assistance or clarification, don’t hesitate to contact us at OBD2-SCANNER.EDU.VN.

4. Troubleshooting Common Issues With The AVH-W4400NEX OBD2 Harness

Even with careful installation, you might encounter issues with your AVH-W4400NEX OBD2 harness. Here’s a guide to troubleshooting common problems, ensuring a smooth and functional integration.

• No OBD2 Data Displayed

  • Problem: The head unit does not show any data from the OBD2 system.

  • Solutions:

    • Check Connections: Ensure the OBD2 harness is securely connected to both the OBD2 port in your car and the AVH-W4400NEX head unit.
    • Verify Wiring: Double-check the wiring connections according to the wiring diagrams for both the harness and the head unit.
    • Inspect OBD2 Port: Use an OBD2 scanner to verify that the OBD2 port in your car is functioning correctly. If the scanner doesn’t work, the port may have a blown fuse or other issues.
    • Compatibility: Confirm that the OBD2 harness is specifically designed for the AVH-W4400NEX and is compatible with your car model.
    • Power Supply: Ensure the head unit is receiving power. Check the power connections and fuses.

• Incorrect Data Displayed

  • Problem: The head unit displays incorrect or inconsistent data.

  • Solutions:

    • Firmware Updates: Check if there are any firmware updates available for the AVH-W4400NEX head unit or the OBD2 harness. Updates can often resolve data interpretation issues.
    • Wiring Configuration: Review the wiring configuration to ensure all wires are connected to the correct pins.
    • OBD2 Protocol: Verify that the head unit and harness support the OBD2 protocol used by your car. Some older cars may use different protocols.
    • Grounding Issues: Ensure the head unit and harness have a good ground connection. Poor grounding can cause inaccurate data readings.
    • Reset the System: Try resetting the head unit to its factory settings and reconfiguring the OBD2 connection.

• Intermittent Connection Problems

  • Problem: The OBD2 connection drops intermittently.

  • Solutions:

    • Secure Connections: Make sure all connections are tight and secure. Use zip ties or electrical tape to prevent wires from coming loose.
    • Check for Corrosion: Inspect the OBD2 port and harness connectors for corrosion. Clean any corroded contacts with a contact cleaner.
    • Wire Damage: Check the wiring for any signs of damage, such as cuts, fraying, or pinched wires. Replace any damaged wiring.
    • OBD2 Port Stability: Ensure the OBD2 port itself is stable and not loose. A loose port can cause intermittent connections.
    • Electromagnetic Interference (EMI): Shield the OBD2 harness and head unit from potential sources of EMI, such as aftermarket lighting or other electronic devices.

• Head Unit Not Recognizing The Harness

  • Problem: The AVH-W4400NEX head unit does not recognize that the OBD2 harness is connected.

  • Solutions:

    • Compatibility Check: Ensure the OBD2 harness is fully compatible with the AVH-W4400NEX and your vehicle.
    • Software Configuration: Check the head unit settings to ensure the OBD2 feature is enabled and properly configured.
    • Harness Detection: Some head units require you to manually detect the OBD2 harness in the settings menu. Refer to the head unit’s manual for instructions.
    • Test with Another Vehicle: If possible, test the harness and head unit in another compatible vehicle to rule out vehicle-specific issues.
    • Professional Inspection: If you’ve tried all the above steps and the head unit still doesn’t recognize the harness, consider having a professional inspect the installation.

• Error Codes Not Displaying

  • Problem: The head unit is connected, but it does not display any error codes when the check engine light is on.

  • Solutions:

    • Check Engine Light Verification: Ensure the check engine light is actually on in your car. Sometimes, the light may be burned out.
    • Error Code Support: Verify that the head unit and harness support the specific error codes generated by your car.
    • Clear Existing Codes: Try clearing any existing error codes using an OBD2 scanner and then see if new codes appear on the head unit when a problem occurs.
    • Diagnostic Mode: Some head units require you to enter a diagnostic mode to view error codes. Consult the head unit’s manual for instructions.
    • Harness Firmware: Check if the OBD2 harness has the latest firmware. An outdated firmware might not support the latest error codes.

By systematically addressing these common issues, you can troubleshoot and resolve most problems with your AVH-W4400NEX OBD2 harness. If you continue to experience difficulties, don’t hesitate to seek assistance from a professional or contact OBD2-SCANNER.EDU.VN for expert support.

5. How To Choose The Right OBD2 Scanner To Complement Your AVH-W4400NEX

Selecting the right OBD2 scanner to complement your AVH-W4400NEX can greatly enhance your vehicle diagnostics and maintenance capabilities. A compatible scanner ensures you can accurately read and interpret vehicle data, troubleshoot issues, and maintain your car’s optimal performance. Here’s how to choose the best OBD2 scanner for your needs:

• Compatibility: Ensure the OBD2 scanner is compatible with the AVH-W4400NEX head unit. Some scanners are designed to work seamlessly with specific head units, offering enhanced features and integration.

• Supported Protocols: Verify that the scanner supports the OBD2 protocols used by your vehicle. Most modern cars use standard protocols like CAN, ISO, and PWM.

• Features:

  • Basic Code Reading: The scanner should be able to read and clear diagnostic trouble codes (DTCs).
  • Live Data: Look for a scanner that provides live data streaming, allowing you to monitor real-time vehicle parameters like engine temperature, RPM, and fuel consumption.
  • Freeze Frame Data: This feature captures a snapshot of vehicle data when a DTC is triggered, helping you diagnose intermittent issues.
  • O2 Sensor Testing: Useful for monitoring the performance of your oxygen sensors.
  • EVAP Testing: Helps diagnose evaporative emission control system issues.
  • Advanced Diagnostics: Some scanners offer advanced features like bidirectional control, component testing, and access to manufacturer-specific codes.

• Ease of Use:

  • User Interface: Choose a scanner with an intuitive interface and clear display.
  • Update Capability: Ensure the scanner can be updated with the latest vehicle data and software.
  • Portability: Consider the size and weight of the scanner, especially if you plan to use it in multiple vehicles.

• Connectivity:

  • Bluetooth: Some scanners connect to smartphones or tablets via Bluetooth, allowing you to view data and run diagnostics using a mobile app.
  • Wi-Fi: Wi-Fi connectivity enables over-the-air updates and access to online databases.
  • USB: A USB port allows you to connect the scanner to a computer for updates and data transfer.

• Brand and Reviews: Research reputable brands and read user reviews to get an idea of the scanner’s reliability and performance. Popular brands include:

  • Autel
  • Innova
  • BlueDriver
  • OBDLink
  • ScanTool

• Budget: OBD2 scanners range in price from basic models to advanced professional tools. Determine your budget and choose a scanner that offers the features you need within your price range.

Recommended OBD2 Scanners For Use With AVH-W4400NEX:

By considering these factors, you can choose an OBD2 scanner that complements your AVH-W4400NEX, providing you with valuable insights into your vehicle’s health and performance. At OBD2-SCANNER.EDU.VN, we can help you select the perfect scanner for your needs. Contact us for expert advice and support.

6. Understanding OBD2 Codes: A Quick Reference Guide

Understanding OBD2 codes is crucial for diagnosing and resolving vehicle issues efficiently. These codes, generated by your car’s computer, provide valuable insights into potential problems. Here’s a quick reference guide to help you interpret common OBD2 codes and take appropriate action.

Structure Of OBD2 Codes

OBD2 codes consist of five characters: one letter followed by four numbers.

• First Character: Indicates the system related to the code:

  • P: Powertrain (engine, transmission)
  • B: Body (airbags, power windows)
  • C: Chassis (ABS, suspension)
  • U: Network (communication systems)

• Second Character: Specifies whether the code is generic or manufacturer-specific:

  • 0: Generic (SAE) code, common to all vehicles
  • 1, 2, or 3: Manufacturer-specific code

• Third Character: Indicates the specific subsystem:

  • 0: Fuel and air metering and auxiliary emission controls
  • 1: Fuel and air metering
  • 2: Fuel and air metering (injector circuit)
  • 3: Ignition system or misfire
  • 4: Auxiliary emission controls
  • 5: Vehicle speed controls and idle control system
  • 6: Computer output circuit
  • 7: Transmission
  • 8: Transmission

• Fourth and Fifth Characters: Provide specific information about the fault within the subsystem.

Common OBD2 Codes And Their Meanings

Tips For Interpreting OBD2 Codes

• Use a Reliable Scanner: Ensure your OBD2 scanner is accurate and up-to-date.
• Consult Vehicle-Specific Resources: Refer to your vehicle’s service manual for detailed information on specific codes.
• Verify the Code: Clear the code and see if it returns to confirm the issue.
• Check for Related Symptoms: Look for other symptoms that may help narrow down the cause.
• Address Multiple Codes Systematically: If multiple codes are present, address the most critical ones first.

Resources For OBD2 Codes

• OBD2-Scanner.EDU.VN: Provides comprehensive information on OBD2 codes, scanners, and vehicle diagnostics.
• Vehicle Service Manuals: Offer detailed information on specific codes and repair procedures for your vehicle.
• Online Forums: Automotive forums can provide valuable insights and advice from other vehicle owners and mechanics.

By understanding OBD2 codes and using reliable resources, you can effectively diagnose and address vehicle issues, keeping your car running smoothly. For expert assistance and more detailed information, contact OBD2-SCANNER.EDU.VN.

7. Maximizing Your AVH-W4400NEX With Advanced OBD2 Features

To fully leverage your AVH-W4400NEX head unit, delve into advanced OBD2 features that offer deeper insights into your vehicle’s performance and health. These capabilities go beyond basic code reading and provide a comprehensive diagnostic experience.

• Real-Time Data Streaming:

  • Enhanced Monitoring: Access real-time data on parameters such as engine temperature, RPM, fuel pressure, and more.
  • Performance Tuning: Use live data to fine-tune engine performance, optimize fuel efficiency, and monitor critical components.
  • Data Logging: Record and analyze data over time to identify trends and potential issues.

• Advanced Diagnostic Tests:

  • Bidirectional Control: Perform active tests on vehicle components, such as turning on/off fuel injectors, activating solenoids, and running diagnostic routines.
  • Component Testing: Evaluate the functionality of individual components like sensors, actuators, and relays.
  • System Reset: Reset various systems, including the oil maintenance light, tire pressure monitoring system (TPMS), and electronic parking brake (EPB).

• Manufacturer-Specific Codes And Data:

  • Access To OEM Data: Retrieve manufacturer-specific diagnostic trouble codes (DTCs) and data parameters.
  • Advanced Diagnostics: Perform diagnostics and troubleshooting based on OEM specifications and procedures.

• Customizable Dashboards And Gauges:

  • Personalized Display: Customize the display with gauges and graphs that show the data you’re most interested in.
  • Alerts And Notifications: Set up alerts for specific parameters to receive notifications when values exceed or fall below specified thresholds.

• Integration With Mobile Apps:

  • Smartphone Connectivity: Connect your AVH-W4400NEX to mobile apps via Bluetooth or Wi-Fi for enhanced functionality.
  • Advanced Diagnostics: Use apps to perform advanced diagnostics, view repair information, and access online databases.

• Firmware Updates And Software Enhancements:

  • Regular Updates: Keep your AVH-W4400NEX and OBD2 harness updated with the latest firmware and software.
  • Improved Compatibility: Benefit from improved compatibility with new vehicle models and enhanced features.

Examples Of Advanced OBD2 Features In Action

By taking advantage of these advanced OBD2 features, you can unlock the full potential of your AVH-W4400NEX, gaining comprehensive insights into your vehicle’s performance and health. For expert guidance on maximizing your AVH-W4400NEX with OBD2, contact us at OBD2-SCANNER.EDU.VN.

METRA Ltd 40-LX11 Antenna Adaptor Cable – Select 2009-Up Lexus/Toyota – .98 [Amazon]

8. Maintaining Your AVH-W4400NEX OBD2 Harness For Longevity

Proper maintenance of your AVH-W4400NEX OBD2 harness is essential to ensure its longevity and reliable performance. Regular checks and preventative measures can help avoid common issues and extend the lifespan of your harness.

• Regular Inspections:

  • Visual Checks: Periodically inspect the OBD2 harness for any signs of damage, such as cuts, fraying, or exposed wires.
  • Connector Condition: Check the connectors at both ends of the harness for corrosion, loose pins, or damage.

• Cleaning The Connectors:

  • Contact Cleaner: Use a contact cleaner to clean the connectors on the OBD2 harness and the OBD2 port in your vehicle.
  • Procedure: Disconnect the harness, spray the contact cleaner on the connectors, and wipe them with a clean cloth.

• Securing The Harness:

  • Proper Routing: Ensure the OBD2 harness is properly routed and secured to prevent it from rubbing against sharp edges or moving parts.
  • Zip Ties: Use zip ties to secure the harness to existing wiring or mounting points.

• Protecting From Environmental Factors:

  • Moisture: Keep the OBD2 harness away from moisture, which can cause corrosion and electrical shorts.
  • Heat: Avoid exposing the harness to extreme heat, which can damage the insulation and connectors.
  • Chemicals: Protect the harness from exposure to harsh chemicals, such as solvents or cleaning agents.

• Checking For Loose Connections:

  • Secure Fit: Regularly check that the connectors are securely attached to both the OBD2 port and the AVH-W4400NEX head unit.
  • Tighten Connections: If you find any loose connections, tighten them carefully to ensure a secure fit.

• Avoiding Overloading The System:

  • Power Draw: Do not overload the OBD2 system with too many devices, as this can cause damage to the harness and the vehicle’s electrical system.
  • Proper Usage: Use the OBD2 harness only for its intended purpose and avoid any modifications that could compromise its functionality.

• Software And Firmware Updates:

  • Stay Updated: Keep the AVH-W4400NEX head unit and any related software updated to ensure compatibility and optimal performance.
  • Compatibility: Check for any firmware updates for the OBD2 harness itself, if applicable.

Maintenance Checklist For AVH-W4400NEX OBD2 Harness

By following these maintenance tips, you can significantly extend the life of your AVH-W4400NEX OBD2 harness and ensure it continues to provide reliable performance. For further assistance and expert advice, contact us at OBD2-SCANNER.EDU.VN.

9. Upgrading Your Car Audio System: Beyond The AVH-W4400NEX

Upgrading your car audio system with the AVH-W4400NEX is a great start, but there are many other enhancements you can make to achieve a truly immersive and high-quality audio experience. Let’s explore additional upgrades that complement the AVH-W4400NEX and take your car audio system to the next level.

• Component Speakers:

  • Improved Sound Quality: Replace your car’s factory speakers with high-quality component speakers, which separate the woofer and tweeter for better sound clarity and imaging.
  • Enhanced Frequency Response: Component speakers offer a wider frequency response, allowing you to hear more detail in your music.

• Subwoofers:

  • Deeper Bass: Add a subwoofer to your system to reproduce low-frequency sounds that your factory speakers can’t handle.
  • Fuller Sound: A subwoofer adds depth and richness to your music, creating a more immersive listening experience.

• Amplifiers:

  • Increased Power: Install an amplifier to provide more power to your speakers, resulting in louder and clearer sound.
  • Better Sound Quality: Amplifiers improve the overall sound quality by reducing distortion and providing a cleaner signal to your speakers.

• Sound Deadening:

  • Reduced Road Noise: Apply sound deadening materials to your car’s doors, floor, and trunk to reduce road noise and improve the clarity of your audio system.
  • Enhanced Bass Response: Sound deadening can also improve the bass response by reducing vibrations and resonances in your car’s panels.

• Digital Sound Processors (DSPs):

  • Fine-Tuned Audio: Add a DSP to your system to fine-tune the audio output to match your car’s acoustics and your personal preferences.
  • Customizable Settings: DSPs allow you to adjust parameters such as equalization, time alignment, and crossover frequencies.

• Wiring And Cables:

  • High-Quality Cables: Use high-quality wiring and cables to ensure a clean and reliable signal path from your head unit to your speakers and amplifiers.
  • Proper Gauges: Use the correct gauge wiring for each component to ensure optimal power delivery and performance.

Example Upgrade Paths

1. Basic Upgrade:

   • Replace factory speakers with component speakers.
   • Add a small amplifier to power the new speakers.

2. Mid-Level Upgrade:

   • Replace factory speakers with component speakers.
   • Add a subwoofer and amplifier.
   • Apply sound deadening to the doors.

3. High-End Upgrade:

   • Replace factory speakers with high-end component speakers.
   • Add a subwoofer and amplifier.
   • Apply sound deadening to the entire car.
   • Install a digital sound processor (DSP) for fine-tuning.

Compatibility And Integration

• Wiring Harnesses: Use wiring harnesses designed for your car model to simplify the installation process and avoid cutting or splicing factory wires.
• Integration Modules: Use integration modules to retain factory features such as steering wheel controls and parking sensors.

By considering these additional upgrades, you can create a car audio system that delivers exceptional sound quality and an immersive listening experience. For expert advice on upgrading your car audio system beyond the AVH-W4400NEX, contact us at OBD2-SCANNER.EDU.VN.

USB Adapter for Select Toyota & Lexus OEM USB Female 30CM – .99 [Amazon]

10. AVH-W4400NEX OBD2 Harness: Frequently Asked Questions

Here are some frequently asked questions about the AVH-W4400NEX OBD2 harness to help you better understand its functionality, compatibility, and benefits.

• What Is An AVH-W4400NEX OBD2 Harness?

  • An AVH-W4400NEX OBD2 harness is an adapter that connects your Pioneer AVH-W4400NEX head unit to your car’s OBD2 port, allowing the head unit to display vehicle data such as engine temperature, RPM, and diagnostic trouble codes.

• Why Do I Need An OBD2 Harness For My AVH-W4400NEX?

  • The OBD2 harness enhances your head unit by providing real-time vehicle data, diagnostic information, and performance monitoring capabilities, improving your overall driving experience and vehicle maintenance.

• Is The AVH-W4400NEX OBD2 Harness Compatible With All Cars?

  • Compatibility depends on the vehicle’s OBD2 system and the harness’s design. Check the harness specifications and your vehicle’s compatibility list before purchasing.

• How Do I Install An AVH-W4400NEX OBD2 Harness?

  • Installation involves connecting the harness to your car’s OBD2 port and the AVH-W4400NEX head unit. Follow the step-by-step guide provided with the harness or consult a professional installer.

• What Kind Of Data Can I See On My AVH-W4400NEX With The OBD2 Harness?

  • You can view various data parameters, including engine temperature, RPM, fuel efficiency, diagnostic trouble codes (DTCs), and more, depending on the harness and vehicle compatibility.

• **Can I Clear Diagnostic Trouble Codes