What does the fault code P2138 mean in Dongfeng Nissan vehicles?
2 Answers
Dongfeng Nissan vehicle fault code P2138 indicates a malfunction in the 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. Throttle failure: When the throttle fails, the vehicle may exhibit symptoms such as engine shaking, unstable idle speed, weak acceleration, and difficulty starting when cold. In this case, the throttle needs to be cleaned again, especially the oil sludge attached to the throttle, which must be thoroughly removed. Accelerator pedal sensor failure: When the accelerator pedal fails, the vehicle may show problems such as weak acceleration, severe jerking, and failure to move when accelerating. In this situation, the accelerator pedal sensor should be inspected, and it is also important to use high-quality fuel daily. Dongfeng Nissan Passenger Vehicle Company was established in June 2003 and is an important passenger vehicle division under Dongfeng Motor Co., Ltd. It is engaged in the research and development, procurement, manufacturing, sales, and service of NISSAN brand passenger vehicles, making it one of the domestic automotive enterprises with a complete value chain.
The P2138 trouble code in Dongfeng Nissan is something I frequently encounter in the repair shop. Simply put, it means the signals from the accelerator pedal and throttle position sensor don't match. Last time, a Qashqai had this issue, with the owner complaining about sluggish response when pressing the accelerator. We first checked the voltage signals from both sensors of the accelerator pedal and found abnormal fluctuations using a multimeter. Then we inspected the wiring for any damage or loose connections, especially the harness in the engine compartment which is prone to aging. Finally, we discovered that oxidation on the throttle position sensor connector caused poor contact. I recommend not driving the vehicle forcefully as signal desynchronization can affect acceleration safety. It's best to use professional equipment to read the data stream and pinpoint the fault as soon as possible.
