P2138 2014 Chevrolet Silverado Code - Accelerator Pedal Position Sensor 1-2 Correlation
Quick Answer
The P2138 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado 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 harness damage or corrosion, Throttle body issues. 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 sensors, Wiring harness damage or corrosion, Throttle body issues.
- 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 2014 Chevrolet Silverado Description
The P2138 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates a problem with the correlation between the accelerator pedal position sensor 1 and sensor 2. This code is typically triggered when the Engine Control Module (ECM) detects that the signals from these two sensors do not match, suggesting a potential issue with the throttle system's operation. The accelerator pedal position sensors are responsible for sending voltage signals to the ECM to indicate how much throttle input the driver is requesting. When the signals from sensor 1 and sensor 2 do not align, it can lead to erratic throttle response, poor engine performance, and even stalling.
Common Causes of P2138 2014 Chevrolet Silverado
- Faulty accelerator pedal position sensors
- Wiring harness damage or corrosion
- Throttle body issues
- ECM malfunction
- Poor electrical connections
Symptoms of P2138 2014 Chevrolet Silverado
- Erratic throttle response
- Poor engine performance
- Stalling or hesitation during acceleration
- Reduced fuel efficiency
- Engine misfires
How to Fix P2138 2014 Chevrolet Silverado
- Begin by diagnosing the specific cause of the P2138 code by using a scan tool to monitor the signals from the accelerator pedal position sensors.
- Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace any faulty wiring as needed.
- Test the accelerator pedal position sensors and throttle body for proper operation. Replace any sensors or components that are found to be faulty.
- Clear the DTC from the ECM's memory using the scan tool and perform a test drive to ensure that the issue has been resolved.
- If the problem persists, consider seeking professional assistance to further diagnose and repair the underlying cause of the P2138 code.
Cost to Fix P2138 2014 Chevrolet Silverado
The typical repair costs for addressing a P2138 code on a 2014 Chevrolet Silverado can range from $200 to $500, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes the cost of diagnostic time, parts, and labor. It's important to note that labor rates at auto repair shops can vary significantly based on location, with rates typically ranging from $80 to $150 per hour. Additionally, rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing. For a more accurate estimate, it's recommended to contact local auto repair shops for pricing information specific to your location and vehicle.
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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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