P2138 2017 GMC Sierra Code - Accelerator Pedal Position Sensor 1-2 Correlation
Quick Answer
The P2138 code for a 2017 GMC Sierra indicates a problem with the correlation between the Accelerator Pedal Position Sensor 1 and Sensor 2. Common causes include Faulty accelerator pedal position sensors, Wiring issues between sensors and ECM, Faulty ECM. 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 2017 GMC Sierra indicates Accelerator Pedal Position Sensor 1-2 Correlation.
- Common causes
- Common causes include Faulty accelerator pedal position sensors, Wiring issues between sensors and ECM, Faulty ECM.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P2138 2017 GMC Sierra Description
The P2138 code for a 2017 GMC Sierra indicates a problem with the correlation between the Accelerator Pedal Position Sensor 1 and Sensor 2. These sensors are responsible for monitoring the position of the accelerator pedal and sending signals to the engine control module (ECM) to adjust the throttle accordingly. When the ECM detects that the signals from these sensors do not match up or are out of range, it triggers the P2138 code.
Common Causes of P2138 2017 GMC Sierra
- Faulty accelerator pedal position sensors
- Wiring issues between sensors and ECM
- Faulty ECM
- Problem with throttle body
- Corrosion or loose connections in the sensor circuit
Symptoms of P2138 2017 GMC Sierra
- Erratic throttle response
- Poor acceleration
- Stalling
- Reduced power mode activation
- Check Engine Light illuminated
How to Fix P2138 2017 GMC Sierra
- Use a diagnostic scanner to read the code and determine the specific cause of the issue.
- Inspect the wiring harness and connections between the sensors and ECM for any damage or corrosion.
- Test the accelerator pedal position sensors using a multimeter to check for proper resistance values.
- Replace any faulty sensors, wiring, or components as needed.
- Clear the code from the ECM and perform a test drive to ensure the issue has been resolved.
Cost to Fix P2138 2017 GMC Sierra
The cost of repairing a P2138 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, parts for this repair, such as replacement sensors or wiring harnesses, can range from $100 to $300. Labor costs can add an additional $100 to $200, depending on the shop's hourly rates and the complexity of the repair. Overall, you can expect to pay between $200 and $500 for this repair, but it's essential to get a detailed quote from a trusted auto repair shop to determine the exact cost for your vehicle.
Need more information about the P2138 2017 GMC Sierra code?
Need more information on how to fix the P2138 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2138 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2138 2017 GMC Sierra Code
What does OBDII code P2138 mean for a 2017 GMC Sierra?
P2138 indicates a correlation issue between Accelerator Pedal Position Sensor 1 and Sensor 2, signaling inconsistent voltage readings.
What are the common symptoms of code P2138 in a 2017 GMC Sierra?
Symptoms may include reduced engine power, the Check Engine Light, unresponsive acceleration, or erratic throttle behavior.
What causes the P2138 code in a 2017 GMC Sierra?
Common causes include a faulty accelerator pedal position sensor, damaged wiring or connectors, or issues with the throttle body.
Can I drive my 2017 GMC Sierra with code P2138?
Driving may be possible, but performance will likely be reduced, and it’s recommended to address the issue promptly to avoid further damage.
How do I diagnose the cause of P2138 on a 2017 GMC Sierra?
Diagnose by inspecting the accelerator pedal position sensor, checking wiring and connectors for damage or corrosion, and testing voltage outputs with a multimeter.
How is code P2138 typically repaired on a 2017 GMC Sierra?
Repairs often involve replacing the accelerator pedal position sensor, fixing damaged wiring, or cleaning throttle body components.
Does P2138 always require replacement of the accelerator pedal position sensor?
No, sometimes the issue is caused by wiring damage or poor electrical connections, which can be repaired without replacing the sensor.
What tools are needed to fix code P2138 on a 2017 GMC Sierra?
You may need a diagnostic scanner, multimeter, and basic hand tools to diagnose and repair the issue effectively.
How much does it cost to fix code P2138 on a 2017 GMC Sierra?
Repair costs vary but typically range from $150 to $400, depending on whether the accelerator pedal position sensor or wiring needs replacement.
Could a dirty throttle body cause code P2138 on a 2017 GMC Sierra?
While less common, a dirty throttle body could contribute to inconsistent sensor readings and should be inspected during diagnosis.
Discuss the causes and fixes for P2138 2017 GMC Sierra OBDII Code
Code P2138 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.