P2138 2016 GMC Sierra Code - Accelerator Pedal Position Sensor 1-2 Correlation
Quick Answer
The Accelerator Pedal Assembly contains 2 Accelerator Pedal Position (APP) sensors. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection. 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, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection.
- 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.
Code P2138 2016 GMC Sierra Description
Both the APP sensors 1 and 2 signal percentages increase as the pedal is depressed, from approximately 0 percent at rest to above 95 percent when fully depressed.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that APP sensor 1 and APP sensor 2 disagree greater than 10 percent for less than 1 s or the ECM detects that both APP sensor 1 and APP sensor 2 are 5 percent greater than the learned minimum position for less than 1 s.
What are the Possible Causes of the DTC P2138 2016 GMC Sierra?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2138 2016 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2138 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P2138 2016 GMC Sierra code?
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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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