P2138 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado 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 2015 Chevrolet Silverado?
- 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 2015 Chevrolet Silverado?
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 2015 Chevrolet Silverado 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 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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