P2138 2015 Chevrolet Silverado Code - Accelerator Pedal Position Sensor 1-2 Correlation
Quick Answer
The diagnostic trouble code P2138 in a 2015 Chevrolet Silverado indicates an issue with the Accelerator Pedal Position Sensor 1-2 Correlation. Common causes include Faulty accelerator pedal position sensors, Wiring or connector issues in the sensor circuit, ECM software or hardware issues. 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 2015 Chevrolet Silverado indicates Accelerator Pedal Position Sensor 1-2 Correlation.
- Common causes
- Common causes include Faulty accelerator pedal position sensors, Wiring or connector issues in the sensor circuit, ECM software or hardware issues.
- 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 2015 Chevrolet Silverado Description
The diagnostic trouble code P2138 in a 2015 Chevrolet Silverado indicates an issue with the Accelerator Pedal Position Sensor 1-2 Correlation. This means that there is a discrepancy between the signals sent by the two accelerator pedal position sensors, which are used to determine the position of the accelerator pedal by the Engine Control Module (ECM). The ECM uses this information to calculate the appropriate amount of fuel to inject into the engine and adjust the throttle accordingly.
Common Causes of P2138 2015 Chevrolet Silverado
- Faulty accelerator pedal position sensors
- Wiring or connector issues in the sensor circuit
- ECM software or hardware issues
- Corrosion or contamination in the sensor connectors
- Mechanical issues with the accelerator pedal assembly
Symptoms of P2138 2015 Chevrolet Silverado
- Hesitation or lack of response when pressing the accelerator pedal
- Engine stalling or surging
- Reduced fuel efficiency
- Illumination of the check engine light
- Limp mode activation
How to Fix P2138 2015 Chevrolet Silverado
- Perform a thorough inspection of the accelerator pedal position sensors, wiring, and connectors to identify any visible damage or issues.
- Test the sensors using a multimeter to check for proper voltage and resistance readings.
- Clean or replace any corroded connectors and ensure proper connections.
- If necessary, replace the faulty accelerator pedal position sensors.
- Clear the diagnostic trouble codes and perform a test drive to verify the repair and ensure the issue has been resolved.
Cost to Fix P2138 2015 Chevrolet Silverado
The typical repair costs for addressing a P2138 code in a 2015 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it's important to note that the actual cost can vary depending on the specific diagnosis, parts needed, and labor rates at the auto repair shop. Factors such as location, vehicle make and model, and engine type can also influence the final cost. It's advisable to consult with a trusted mechanic or dealership to get an accurate estimate for the repair.
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Frequently Asked Questions about P2138 2015 Chevrolet Silverado Code
1. What does the OBDII code P2138 mean on a 2015 Chevrolet Silverado?
The code P2138 indicates an issue with the correlation between Accelerator Pedal Position Sensor 1 and Sensor 2, meaning the sensors are providing mismatched or out-of-range signals.
2. What are the common symptoms of code P2138 in a 2015 Chevrolet Silverado?
Symptoms include reduced engine power, the "Reduced Engine Power" message on the dash, poor throttle response, and in some cases, the engine may not accelerate properly.
3. What causes the P2138 code on a 2015 Chevrolet Silverado?
Common causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the pedal assembly, or issues with the throttle body.
4. Can I drive my 2015 Chevrolet Silverado with the P2138 code?
Driving with the P2138 code is not recommended because it may limit engine power and create unsafe driving conditions due to throttle control issues.
5. How do I fix the P2138 code on a 2015 Chevrolet Silverado?
Start by inspecting the accelerator pedal position sensor, its wiring, and connectors. Replace the sensor if it's faulty or repair damaged wiring as needed.
6. How much does it cost to fix a P2138 code on a 2015 Chevrolet Silverado?
Repairs can range from $100 to $300, depending on whether the issue is with the accelerator pedal sensor, wiring, or throttle body.
7. Can a bad throttle body cause the P2138 code on a 2015 Chevrolet Silverado?
Yes, a malfunctioning throttle body or its wiring can cause the P2138 code by disrupting the correlation between the accelerator pedal sensors.
8. How do I reset the P2138 code on my 2015 Chevrolet Silverado after repairs?
After completing repairs, use an OBDII scanner to clear the code. If the issue is resolved, the code will not return.
9. What should I check first when diagnosing the P2138 code on a 2015 Chevrolet Silverado?
Start by inspecting the accelerator pedal assembly for damage or loose connections, as well as checking the wiring harness for wear or corrosion.
10. Does the P2138 code mean I need to replace the accelerator pedal on my 2015 Chevrolet Silverado?
Not necessarily. While the accelerator pedal position sensor is a common culprit, you should test the sensor and inspect wiring before replacing the pedal assembly.
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