P2138 Buick 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 Buick 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 Buick 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 Buick?
- 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 Buick?
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 Buick 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.
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Frequently Asked Questions about P2138 Buick Code
1. What are the common symptoms of OBDII code P2138 in a Buick related to the Accelerator Pedal Position Sensor 1-2 Correlation?
The common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.
2. What are the possible causes of OBDII code P2138 in a Buick related to the Accelerator Pedal Position Sensor 1-2 Correlation?
Possible causes include a faulty accelerator pedal position sensor, issues with the throttle position sensor, wiring or connector problems, or a problem with the engine control module.
3. How can I diagnose the OBDII code P2138 in my Buick related to the Accelerator Pedal Position Sensor 1-2 Correlation?
Diagnosing the issue involves using a diagnostic scanner to retrieve the trouble codes, checking the sensor's voltage readings, inspecting wiring and connectors for damage, and performing a thorough visual inspection.
4. Can I still drive my Buick with OBDII code P2138 related to the Accelerator Pedal Position Sensor 1-2 Correlation?
It is not recommended to drive the vehicle with this code as it can lead to unsafe driving conditions and potential engine damage. It is best to address the issue promptly.
5. How do I repair OBDII code P2138 in my Buick related to the Accelerator Pedal Position Sensor 1-2 Correlation?
Repairing this code typically involves replacing the faulty accelerator pedal position sensor, fixing any wiring or connector issues, or reprogramming the engine control module if necessary.
6. Is it possible to reset the OBDII code P2138 related to the Accelerator Pedal Position Sensor 1-2 Correlation without fixing the underlying issue?
While you can clear the trouble code with a diagnostic scanner, it is important to address the root cause of the problem to prevent it from recurring and potentially causing more significant issues.
7. Are there any preventive maintenance tips to avoid OBDII code P2138 related to the Accelerator Pedal Position Sensor 1-2 Correlation?
Regularly inspecting and cleaning the throttle body, keeping up with scheduled maintenance, and avoiding harsh driving habits can help prevent issues with the accelerator pedal position sensor.
8. How long does it typically take to repair OBDII code P2138 in a Buick related to the Accelerator Pedal Position Sensor 1-2 Correlation?
The repair time can vary depending on the exact cause of the issue and the complexity of the repair. In general, it can take anywhere from an hour to several hours to complete the repair.
9. Can a DIY enthusiast fix OBDII code P2138 related to the Accelerator Pedal Position Sensor 1-2 Correlation?
While some DIY enthusiasts may have the skills and tools to address this issue, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the problem is fixed correctly.
10. How much does it cost to repair OBDII code P2138 related to the Accelerator Pedal Position Sensor 1-2 Correlation in a Buick?
The cost of repair can vary depending on the exact cause of the issue, the required parts, and the labor rates in your area. It is advisable to obtain a few quotes from reputable mechanics to compare prices.
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