Reasons for P2015 Intake Manifold Runner Position Unbelievable Signal?
2 Answers
P2015 fault code indicates an unbelievable signal from the intake manifold runner position. Here are the specific details: 1. The cause of the fault is excessive carbon buildup in the intake manifold leading to runner sticking: Use the KT600 fault diagnostic tool to read the fault code, which is P2015. The reason for the fault is excessive carbon buildup in the intake manifold causing the runner to stick. 2. After performing the fault code clearing procedure, the fault code disappears and the exhaust emission warning light turns off: After restarting the engine, the exhaust emission warning light does not illuminate, and there are no fault codes. 3. According to the code priority principle in the diagnostic method, troubleshoot based on the fault code: Keep the engine in idle state, read the engine data stream, perform data matching, and after automatic matching is completed, recheck the data stream.
Encountering the P2015 trouble code, I suspect the issue of unreliable intake manifold runner position signal is mostly caused by a dirty or faulty position sensor. The sensor on the intake manifold detects the runner's opening degree, and over time, accumulated dust and oil can cause it to malfunction, leading to misjudgment of the position. Alternatively, the runner shaft itself might get stuck and fail to move, resulting in signals that don't match expectations. Additionally, aging or loose wiring can cause intermittent and unreliable signals, not to mention the interference from vacuum system leaks. When driving, the engine might struggle to breathe, leading to sluggish acceleration and increased fuel consumption. My previous car had this exact issue, and regularly cleaning the intake manifold as a preventive measure worked quite well. If that doesn’t help, it’s best to quickly visit a professional shop to replace the sensor or check the ECU tuning, to avoid minor issues turning into major repairs that could affect safety. These are the common causes I’ve personally experienced and summarized.
