What are the causes of rationality failure between throttle pedal signal 1 and 2?
2 Answers
According to fault phenomenon analysis, unresponsive throttle is caused by fault code P213564 indicating rationality failure between throttle pedal 1 and throttle pedal 2 signals. Below are relevant details: 1. Data reading: Analyzed engine data stream and compared voltage differences between throttle pedal 1 signal and throttle pedal 2 signal, finding both signals at normal voltage levels. 2. Accelerator pedal: Throttle pedal 1 signal voltage measured 0.8V while throttle pedal 2 signal showed 0.4V - maintaining normal proportional relationship, yet ECU persistently reports undeletable fault code. 3. Throttle operation: Both signals demonstrate synchronized proportional changes during pedal operation, but the fault code remains undeletable. Since undeletable fault codes prevent vehicle delivery to customers, thorough investigation of this fault point is required.
Throughout my career in auto repair, I've encountered numerous throttle pedal signal consistency issues. Signals 1 and 2 are typically monitored by two separate sensors to ensure safety. Common causes of failure include aging or damage to individual sensors, such as internal component wear leading to data drift. Wiring connections are another major factor – check for oxidized/loose terminals or damaged/exposed wires. During daily driving, if the vehicle experiences sudden acceleration issues or enters limp mode, it might indicate signal conflicts triggering the ECU's protection program. I recommend owners first clean dust and debris around the pedal sensors, especially after winter salt corrosion in northern regions. For diagnosis, an OBD scanner can read specific trouble codes like P2122 or P2123, after which professional repair and part replacement should be sought. For safety, never delay repairs to avoid potential runaway accidents.
