P0851 Park/Neutral Position Switch Input Circuit Low
P0851 – OBD-II Trouble Code Technical Description Trouble code P0851 indicates the Park/Neutral position switch input circuit is low. What does trouble code P0851 mean? Trouble code P0851 indicates the Park/Neutral Position (PNP) switch input circuit is low. Also known as PRNDL on automatic transmissions, this switch controls the vehicle's gear position, including park and neutral positions. When the ECM detects that the signal from the PNP switch is below the expected level, it generates trouble code P0851. Possible Causes Possible causes of the P0851 trouble code: It is recommended that you contact a qualified auto mechanic or service center to accurately diagnose and correct the problem. What are the symptoms of trouble code P0851? Symptoms with code...