What is the solution for Nissan fault code P2138?
2 Answers
p2138 fault code indicates a problem with the car's throttle or accelerator pedal sensor. The solution is to have the fault repaired at a repair shop or 4S store, and then clear the fault code. The following are the specific causes and solutions for the P2138 fault code: Throttle failure: When the throttle fails, the vehicle will exhibit symptoms such as engine shaking, unstable engine idle or no idle, high idle speed that does not drop, insufficient engine power, poor acceleration performance, unstable operation, and difficulty in starting the engine, especially during cold starts. In this case, the throttle should be cleaned again, especially to remove the oil sludge attached to the throttle. If the throttle is damaged, it should be replaced in time. Accelerator pedal sensor problem: When the accelerator pedal fails, the vehicle will exhibit problems such as weak acceleration, severe jerking, and no response when stepping on the gas. In this case, the accelerator pedal sensor should be checked, and high-quality fuel should be used daily.
Fault code P2138 indicates a voltage mismatch between throttle pedal position sensors A and B, commonly found in Nissan vehicles. I recently dealt with a similar issue. The first step is to confirm the code with an OBD scanner, then check if the sensor connector is loose or corroded, as dust or moisture can interfere with the signal. After a simple cleaning, try recalibrating the sensor by disconnecting the battery negative terminal for a few minutes and reconnecting it, which resets the ECU. If the problem persists, the sensor may need replacement—during my DIY attempt, I found that an aging sensor can repeatedly trigger errors. This issue affects driving safety, such as causing unstable acceleration, so regular connector checks are advisable for prevention. Don’t delay once detected; prompt action can avoid costlier repairs.
