P2138 2016 GMC Sierra Code - Accelerator Pedal Position Sensor 1-2 Correlation
Quick Answer
The P2138 code in a 2016 GMC Sierra indicates a problem with the correlation between Accelerator Pedal Position Sensor 1 and Sensor 2. Common causes include Faulty Accelerator Pedal Position Sensor 1 or Sensor 2, Wiring issues or loose connections in the sensor circuit, Corrosion or damage to sensor connectors. 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 2016 GMC Sierra indicates Accelerator Pedal Position Sensor 1-2 Correlation.
- Common causes
- Common causes include Faulty Accelerator Pedal Position Sensor 1 or Sensor 2, Wiring issues or loose connections in the sensor circuit, Corrosion or damage to sensor connectors.
- 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 2016 GMC Sierra Description
The P2138 code in a 2016 GMC Sierra indicates a problem with the correlation between Accelerator Pedal Position Sensor 1 and Sensor 2. This means that the signals sent by these two sensors do not align correctly, leading to discrepancies in the data that the vehicle's engine control module (ECM) receives. The Accelerator Pedal Position Sensor is responsible for providing information to the ECM about the position of the accelerator pedal, which in turn helps regulate the fuel and air mixture for optimal engine performance.
Common Causes of P2138 2016 GMC Sierra
- Faulty Accelerator Pedal Position Sensor 1 or Sensor 2
- Wiring issues or loose connections in the sensor circuit
- Corrosion or damage to sensor connectors
- Issues with the ECM or software glitches
- Environmental factors such as extreme temperatures affecting sensor performance
Symptoms of P2138 2016 GMC Sierra
- Lack of power when accelerating
- Hesitation or jerking when pressing the accelerator
- Rough idling or engine misfires
- Engine stalling
- Reduced fuel efficiency
How to Fix P2138 2016 GMC Sierra
- Perform a thorough inspection of the Accelerator Pedal Position Sensors and associated wiring for any visible damage or corrosion.
- Test the sensors using a multimeter to ensure they are functioning correctly.
- Replace any faulty sensors or wiring as needed.
- Clear the code from the ECM using a diagnostic tool and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, consult a professional mechanic for further diagnosis and potential ECM replacement.
Cost to Fix P2138 2016 GMC Sierra
The typical repair costs for addressing a P2138 code in a 2016 GMC Sierra can range from $200 to $500, depending on the extent of the issue and the parts needed for replacement. This estimate includes parts and labor, but specific costs may vary based on the location, dealership rates, and the severity of the problem. It is advisable to consult with a trusted mechanic or dealership for a more accurate estimate based on the specific circumstances.
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Frequently Asked Questions about P2138 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P2138 in a 2016 GMC Sierra?
The common symptoms of code P2138 include reduced engine power, difficulty accelerating, and the vehicle going into a reduced power mode.
2. What does the OBDII code P2138 on a 2016 GMC Sierra indicate?
Code P2138 indicates a correlation error between the accelerator pedal position sensor 1 and sensor 2.
3. What are the possible causes of OBDII code P2138 in a 2016 GMC Sierra?
Possible causes of code P2138 include a faulty accelerator pedal position sensor, wiring issues, a defective throttle body, or problems with the engine control module.
4. How can I diagnose the OBDII code P2138 on a 2016 GMC Sierra?
Diagnosing code P2138 involves checking the wiring harness for damage, testing the accelerator pedal position sensors, inspecting the throttle body, and scanning the vehicle for any other related trouble codes.
5. Can I drive my 2016 GMC Sierra with OBDII code P2138?
It is not recommended to drive your vehicle with code P2138 as it can lead to unsafe driving conditions due to reduced engine power and potential loss of acceleration control.
6. How can I repair OBDII code P2138 in a 2016 GMC Sierra?
Repairing code P2138 may involve replacing the accelerator pedal position sensor, repairing any damaged wiring, cleaning or replacing the throttle body, or reprogramming the engine control module.
7. Is it safe to continue driving my 2016 GMC Sierra if the OBDII code P2138 comes on intermittently?
It is not advisable to continue driving your vehicle if code P2138 appears intermittently. It is best to address the underlying issue promptly to avoid potential safety hazards.
8. Can a DIY enthusiast fix OBDII code P2138 in a 2016 GMC Sierra?
While some aspects of diagnosing and repairing code P2138 can be done by a DIY enthusiast, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.
9. How much does it cost to fix OBDII code P2138 in a 2016 GMC Sierra?
The cost of fixing code P2138 can vary depending on the specific cause of the issue, parts needed for repair, and labor costs. It is best to get a diagnostic assessment from a mechanic for an accurate estimate.
10. Will resetting the OBDII system clear code P2138 on a 2016 GMC Sierra?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing P2138 is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem.
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