What is the P2138 fault?

[LaWyatt]

If the vehicle displays the P2138 fault code, it indicates an issue with the car's throttle or accelerator pedal sensor. The specific cause should be diagnosed by professionals at a repair shop or 4S dealership. Details are as follows: 1. Throttle failure: When the throttle malfunctions, symptoms may include engine shaking, unstable idling, poor acceleration, and difficulty starting when cold. In such cases, the throttle should be thoroughly cleaned, especially removing any oil sludge buildup. If the throttle is structurally damaged, it should be replaced promptly. 2. Accelerator pedal sensor problem: When the accelerator pedal fails, symptoms may include weak acceleration, severe jerking, and unresponsiveness to throttle input. In this situation, the accelerator pedal sensor should be inspected, and high-quality fuel should be used regularly. After repairs, the fault code must be cleared promptly; otherwise, it may cause memory confusion in the vehicle's electronic system, leading to unnecessary issues later on.