P2138 2008 Nissan Altima Sedan Code - Accelerator Pedal Position Sensor Circuit Range/Performance
Quick Answer
The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. 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 2008 Nissan Altima Sedan indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
- 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 2008 Nissan Altima Sedan Description
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation
such as fuel cut.
What are the Possible Causes of the DTC P2138 2008 Nissan Altima Sedan?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Faulty Electric Throttle Control Actuator
How to Fix the DTC P2138 2008 Nissan Altima Sedan?
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 2008 Nissan Altima Sedan 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 2008 Nissan Altima Sedan Code
1. What does the OBDII code P2138 for a 2008 Nissan Altima Sedan indicate?
The code P2138 indicates an issue with the Accelerator Pedal Position Sensor Circuit Range/Performance on a 2008 Nissan Altima Sedan.
2. What are the common symptoms of OBDII code P2138 on a 2008 Nissan Altima Sedan?
Common symptoms of code P2138 include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into a "limp mode" where it operates at reduced performance.
3. What are the possible causes of OBDII code P2138 on a 2008 Nissan Altima Sedan?
Possible causes of code P2138 include a faulty accelerator pedal position sensor, problems with the throttle position sensor, issues with the wiring or connectors in the sensor circuit, or a malfunction in the engine control module.
4. How can I diagnose the source of OBDII code P2138 on my 2008 Nissan Altima Sedan?
Diagnosing code P2138 typically involves using a scan tool to check for the code, inspecting the accelerator pedal and throttle position sensors for any physical damage, and testing the sensor circuit for proper voltage and continuity.
5. What are some DIY repair tips for fixing OBDII code P2138 on a 2008 Nissan Altima Sedan?
DIY repair tips for code P2138 may include checking and cleaning the sensor connectors, inspecting the wiring for any damage, and replacing the accelerator pedal position sensor if it is found to be faulty.
6. Can driving with OBDII code P2138 on a 2008 Nissan Altima Sedan cause further damage to the vehicle?
Continuing to drive with code P2138 may cause issues like poor fuel efficiency, potential damage to the engine or transmission, and increased risk of stalling or loss of power while driving.
7. How much does it typically cost to repair OBDII code P2138 on a 2008 Nissan Altima Sedan?
The cost of repairing code P2138 can vary depending on the root cause of the issue, but it may range from around $100 to $300 for parts and labor if a sensor replacement or wiring repair is needed.
8. Is it safe to reset the OBDII code P2138 on a 2008 Nissan Altima Sedan using a scan tool?
Resetting the code with a scan tool may temporarily clear the warning light, but it is important to diagnose and address the underlying issue causing code P2138 to prevent further damage and ensure safe driving conditions.
9. How long does it typically take to repair OBDII code P2138 on a 2008 Nissan Altima Sedan at a mechanic's shop?
The repair time for code P2138 can vary depending on the exact cause of the issue and the shop's workload, but it may take anywhere from 1 to 3 hours for diagnosis and repair.
10. Can a faulty accelerator pedal position sensor affect the overall performance of a 2008 Nissan Altima Sedan?
Yes, a faulty accelerator pedal position sensor can significantly impact the performance of the vehicle by causing issues like poor acceleration, reduced power output, and potential stalling while driving.
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