P2138 2014 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 2014 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 2014 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 2014 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 2014 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 2014 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 2014 Chevrolet Silverado Code
1. What does the OBDII code P2138 mean on a 2014 Chevrolet Silverado?
P2138 indicates a correlation issue between the two sensors in the accelerator pedal position (APP) sensor, meaning the readings from APP Sensor 1 and APP Sensor 2 do not match.
2. What are the symptoms of code P2138 in a 2014 Chevrolet Silverado?
Common symptoms include reduced engine power mode, delayed throttle response, a check engine light, or unresponsive acceleration.
3. What causes the P2138 code on a 2014 Chevrolet Silverado?
Possible causes include a faulty accelerator pedal position sensor, damaged wiring or connectors, water intrusion in the wiring harness, or a problem with the throttle body.
4. Can I drive my 2014 Chevrolet Silverado with the P2138 code?
While the truck may still drive in reduced power mode, it’s not recommended as it could be unsafe due to limited acceleration and throttle response.
5. How do I fix the P2138 code on my Silverado?
Repairs may involve replacing the accelerator pedal position sensor, inspecting and repairing damaged wiring, cleaning the throttle body, or recalibrating the APP sensor.
6. How much does it cost to fix the P2138 code on a 2014 Silverado?
Repair costs vary, but replacing the accelerator pedal position sensor typically costs $150–$300, including parts and labor.
7. Can a dirty throttle body cause the P2138 code?
Yes, a dirty or malfunctioning throttle body can contribute to throttle response issues and trigger the P2138 code.
8. How do I reset the P2138 code after repairs?
After addressing the issue, clear the code using an OBDII scanner. If the problem persists, further diagnosis may be required.
9. What tools are needed to diagnose the P2138 code?
You’ll need an OBDII scanner, a multimeter for testing wiring, and potentially a repair manual for your Silverado.
10. Is the P2138 code related to the throttle position sensor (TPS)?
Yes, the P2138 code is indirectly related to the throttle position sensor since the APP sensor and TPS work together to control throttle response.
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