P2138 Infiniti Code - Accelerator Pedal Position Sensor Circuit Range/Performance
Quick Answer
The P2138 code in an Infiniti indicates an issue with the accelerator pedal position sensor circuit's range or performance. Common causes include Faulty accelerator pedal position sensor: The sensor itself may be defective or worn out, Wiring issues: Corroded, damaged, or loose wiring connections can disrupt the sensor's signals, ECM malfunction: A problem with the engine control module can affect the sensor's readings. 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 Infiniti indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
- Common causes
- Common causes include Faulty accelerator pedal position sensor: The sensor itself may be defective or worn out, Wiring issues: Corroded, damaged, or loose wiring connections can disrupt the sensor's signals, ECM malfunction: A problem with the engine control module can affect the sensor's readings.
- 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 Infiniti Description
The P2138 code in an Infiniti indicates an issue with the accelerator pedal position sensor circuit's range or performance. The accelerator pedal position sensor is a crucial component of the vehicle's electronic throttle control system. It monitors the position of the accelerator pedal and sends signals to the engine control module (ECM) to adjust the throttle opening accordingly. When this sensor malfunctions or sends incorrect signals, it can lead to a variety of performance issues and potentially compromise the safety and drivability of the vehicle.
Common Causes of P2138 Infiniti
- Faulty accelerator pedal position sensor: The sensor itself may be defective or worn out.
- Wiring issues: Corroded, damaged, or loose wiring connections can disrupt the sensor's signals.
- ECM malfunction: A problem with the engine control module can affect the sensor's readings.
- Throttle body issues: Problems with the throttle body can impact the sensor's performance.
- Environmental factors: Exposure to moisture, dirt, or other contaminants can affect the sensor's operation.
Symptoms of P2138 Infiniti
- Erratic throttle response: The vehicle may hesitate or exhibit unpredictable acceleration.
- Lack of power: The vehicle may struggle to accelerate or maintain speed.
- Stalling: The engine may stall unexpectedly, especially during acceleration.
- Limp mode: The vehicle may go into limp mode, limiting power and speed.
How to Fix P2138 Infiniti
- Diagnose the issue: Use a diagnostic tool to read the trouble codes and perform a thorough inspection of the accelerator pedal position sensor and related components.
- Replace the accelerator pedal position sensor: If the sensor is faulty, it will need to be replaced with a new one.
- Check wiring connections: Inspect the wiring harness for any damage, corrosion, or loose connections, and repair or replace as needed.
- Test the ECM: Ensure that the engine control module is functioning correctly and reprogram if necessary.
- Clear codes and test drive: Clear the trouble codes from the ECM, reset adaptations, and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P2138 Infiniti
The cost of repairing a P2138 code in an Infiniti can vary depending on the specific model, the extent of the issue, and labor rates in your area. Typically, the cost of replacing the accelerator pedal position sensor and addressing related wiring or ECM issues can range from $200 to $500 in parts and labor. Additional diagnostic fees and any necessary reprogramming may incur extra charges. It's recommended to consult with a certified mechanic or dealership for a more accurate estimate based on your vehicle's needs and location.
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Information for Specific Infiniti Models
- P2138 2003 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
- P2138 2004 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
- P2138 2005 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
- P2138 2006 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
Frequently Asked Questions about P2138 Infiniti Code
1. What are the common symptoms of OBDII code P2138 in an Infiniti?
Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into limp mode.
2. What causes the OBDII code P2138 in an Infiniti?
The code is typically triggered by a fault in the accelerator pedal position sensor circuit, which may be caused by a faulty sensor, wiring issues, or a problem with the throttle body.
3. How serious is the OBDII code P2138 in an Infiniti?
This code should be taken seriously as it can affect the drivability of the vehicle and may lead to unsafe driving conditions. It is important to address the issue promptly to prevent further damage.
4. Can I still drive my Infiniti with the OBDII code P2138 present?
It is not recommended to drive the vehicle with this code present, as it can lead to performance issues and potential safety hazards. It is best to have the issue diagnosed and repaired before driving the vehicle again.
5. How can I diagnose the OBDII code P2138 in my Infiniti?
Diagnosing this code typically involves using a scan tool to read the code and then testing the accelerator pedal position sensor, throttle body, and associated wiring for faults.
6. What are some repair options for the OBDII code P2138 in an Infiniti?
Repair options may include replacing the accelerator pedal position sensor, repairing or replacing damaged wiring, cleaning the throttle body, or reprogramming the vehicle's computer.
7. Can a DIY enthusiast fix the OBDII code P2138 in an Infiniti?
While some simple repairs like cleaning the throttle body or checking for loose connections can be done by DIY enthusiasts, diagnosing and repairing the root cause of the code may require professional expertise.
8. How much does it cost to fix the OBDII code P2138 in an Infiniti?
The cost of fixing this code can vary depending on the exact cause of the issue and the labor rates in your area. It is recommended to get a diagnostic inspection to get a more accurate estimate.
9. Will resetting the OBDII code P2138 make it go away permanently?
Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to return. It is important to diagnose and repair the root cause of the problem.
10. Is the OBDII code P2138 specific to certain Infiniti models?
While the code is commonly associated with various Infiniti models, it can occur in other vehicles as well. It is always best to refer to the specific diagnostic information for your vehicle to ensure accurate diagnosis and repair.
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