P2138 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 Chevrolet Silverado Code
1. What does the OBDII code P2138 mean on a 2016 Chevrolet Silverado?
P2138 indicates a correlation issue between Accelerator Pedal Position (APP) Sensor 1 and Sensor 2, meaning the signals from the two sensors do not match as expected.
2. What are common symptoms of code P2138 on a 2016 Chevy Silverado?
Symptoms may include reduced engine power mode (limp mode), poor acceleration, a check engine light, and unresponsive throttle.
3. What causes the P2138 code to appear on a 2016 Chevrolet Silverado?
Common causes include a faulty accelerator pedal position sensor, damaged or corroded wiring, loose electrical connections, or issues with the throttle body.
4. Can I drive my 2016 Silverado with the P2138 code?
While the truck might still be operable, it could enter reduced power mode, making driving unsafe. It’s best to address the code promptly.
5. How do you diagnose the P2138 code on a 2016 Chevy Silverado?
Diagnosis involves scanning for additional codes, visually inspecting the accelerator pedal and its wiring, testing the APP sensor voltages, and checking the throttle body operation.
6. How is the P2138 code fixed on a 2016 Chevrolet Silverado?
Repairs may include replacing the APP sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing the throttle body if necessary.
7. How much does it cost to fix the P2138 code on a 2016 Silverado?
Repair costs can vary. Replacing the APP sensor typically costs $100–$300, while wiring repairs or throttle body replacement may increase the expense.
8. Can a dirty throttle body cause the P2138 code on a Chevy Silverado?
While uncommon, a dirty or malfunctioning throttle body can contribute to signal mismatches and trigger the P2138 code.
9. How do I reset the P2138 code on my 2016 Chevy Silverado?
After repairing the issue, the code can be cleared with an OBDII scanner. However, it may return if the underlying problem isn’t resolved.
10. What maintenance can help prevent the P2138 code?
Regularly inspect the accelerator pedal wiring for damage, keep electrical connections clean, and ensure the throttle body is free of carbon buildup.
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