P2138 2016 Chevrolet Silverado Code - Accelerator Pedal Position Sensor 1-2 Correlation
Quick Answer
The P2138 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates an issue with the correlation between Accelerator Pedal Position Sensor 1 and Accelerator Pedal Position Sensor 2. Common causes include Faulty Accelerator Pedal Position Sensor 1 or Sensor 2, Wiring or connector issues in the sensor circuit, Corrosion or contamination affecting sensor operation. 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 1 or Sensor 2, Wiring or connector issues in the sensor circuit, Corrosion or contamination affecting sensor operation.
- 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 2016 Chevrolet Silverado Description
The P2138 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado indicates an issue with the correlation between Accelerator Pedal Position Sensor 1 and Accelerator Pedal Position Sensor 2. These sensors are crucial components of the vehicle's electronic throttle control system, which regulates the amount of air entering the engine based on the driver's input through the accelerator pedal. The correlation between these sensors is essential for the proper functioning of the throttle system, as any discrepancy can lead to erratic engine performance and potentially unsafe driving conditions.
Common Causes of P2138 2016 Chevrolet Silverado
- Faulty Accelerator Pedal Position Sensor 1 or Sensor 2.
- Wiring or connector issues in the sensor circuit.
- Corrosion or contamination affecting sensor operation.
- ECM software or hardware malfunction.
- Mechanical issues with the throttle body or related components.
Symptoms of P2138 2016 Chevrolet Silverado
- Hesitation or lack of response when pressing the accelerator pedal.
- Engine surging or fluctuating idle speed.
- Reduced power or inability to accelerate smoothly.
- Illumination of the Check Engine Light.
- Vehicle going into a reduced power mode.
How to Fix P2138 2016 Chevrolet Silverado
- Begin by diagnosing the specific cause of the P2138 code using a scan tool to monitor the sensor readings and identify any discrepancies.
- Inspect the wiring and connectors for damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the Accelerator Pedal Position Sensors for proper operation and replace any faulty sensors.
- Clear the DTC and perform a throttle relearn procedure to recalibrate the sensors and ensure proper correlation.
- Test drive the vehicle to confirm that the issue has been resolved and that the throttle response is now normal.
Cost to Fix P2138 2016 Chevrolet Silverado
The cost of repairing a P2138 code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a faulty Accelerator Pedal Position Sensor or repairing wiring/connectors can range from $150 to $300 for parts and labor. However, if the issue is more complex and requires ECM reprogramming or throttle body replacement, the cost could be higher, potentially exceeding $500. It's recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific diagnosis and repair needed. Keep in mind that labor rates can vary between different auto repair shops, so it's advisable to inquire about rates in your local area for a more precise cost estimate.
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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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