P2138 2008 Ford Fusion Code - Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
Quick Answer
The P2138 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates a voltage correlation issue between the throttle position sensor (TPS) and the pedal position sensor. Common causes include Faulty throttle position sensor, Faulty pedal position sensor, Wiring harness damage or corrosion. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2138 2008 Ford Fusion indicates Throttle/Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
- Common causes
- Common causes include Faulty throttle position sensor, Faulty pedal position sensor, Wiring harness damage or corrosion.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P2138 2008 Ford Fusion Description
The P2138 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates a voltage correlation issue between the throttle position sensor (TPS) and the pedal position sensor. In modern vehicles, the throttle position sensor monitors the position of the throttle valve, while the pedal position sensor detects the position of the accelerator pedal. The correlation between these two sensors is crucial for the engine control module (ECM) to accurately determine the appropriate fuel delivery and throttle response.
Common Causes of P2138 2008 Ford Fusion
- Faulty throttle position sensor.
- Faulty pedal position sensor.
- Wiring harness damage or corrosion.
- ECM malfunction.
- Poor electrical connections.
Symptoms of P2138 2008 Ford Fusion
- Hesitation or lack of response when pressing the accelerator pedal.
- Engine stalling or rough idling.
- Sudden acceleration without pressing the accelerator.
- Reduced fuel efficiency.
- Vehicle entering limp mode.
How to Fix P2138 2008 Ford Fusion
- Diagnose the issue using a scan tool to confirm the P2138 code and pinpoint the exact cause.
- Inspect the throttle position sensor, pedal position sensor, and wiring harness for any signs of damage or wear.
- Replace the faulty sensor or repair any damaged wiring connections.
- Clear the DTC and perform a throttle relearn procedure to recalibrate the sensors.
- Test drive the vehicle to ensure the issue has been resolved and the code does not return.
Cost to Fix P2138 2008 Ford Fusion
The cost of repairing a P2138 code on a 2008 Ford Fusion can vary depending on the specific cause of the issue. In general, replacing a throttle position sensor or pedal position sensor can range from $100 to $300 each, not including labor costs. The total repair cost, including parts and labor, can range from $200 to $600 or more. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to get a detailed estimate from a qualified mechanic.
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Frequently Asked Questions about P2138 2008 Ford Fusion Code
1. What are the common symptoms of OBDII code P2138 in a 2008 Ford Fusion?
- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and illuminated Check Engine Light.
2. What does the OBDII code P2138 indicate in a 2008 Ford Fusion?
- The code indicates a voltage correlation issue between the throttle position sensor and the pedal position sensor.
3. What are the possible causes of OBDII code P2138 in a 2008 Ford Fusion?
- Possible causes include a faulty throttle position sensor, pedal position sensor, wiring issues, or a problem with the electronic control module.
4. How can I diagnose the cause of OBDII code P2138 in my 2008 Ford Fusion?
- A thorough inspection of the throttle and pedal position sensors, as well as their wiring harnesses, using a multimeter and scan tool can help pinpoint the issue.
5. Can I continue driving my 2008 Ford Fusion with OBDII code P2138?
- It is not recommended to drive your vehicle with this code as it can lead to unsafe driving conditions and potential further damage to the engine.
6. How can I repair OBDII code P2138 in my 2008 Ford Fusion?
- The repair typically involves replacing either the throttle position sensor, pedal position sensor, or repairing any damaged wiring connections.
7. Are there any DIY tips for fixing OBDII code P2138 in a 2008 Ford Fusion?
- While it is possible to replace the sensors yourself, it is recommended to have a professional diagnose and repair the issue to ensure proper functioning.
8. How much does it cost to fix OBDII code P2138 in a 2008 Ford Fusion?
- The cost of repair can vary depending on the cause of the issue, but it typically ranges from $200 to $500 for parts and labor.
9. Will resetting the OBDII code P2138 in my 2008 Ford Fusion make it go away permanently?
- Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue is not fixed, the code is likely to reappear.
10. How can I prevent OBDII code P2138 from occurring in my 2008 Ford Fusion in the future?
- Regular maintenance, such as keeping sensors clean and checking for any signs of wear or damage, can help prevent this code from recurring.
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