What does code P086D mean?

Q: What does code P086D mean?

Neutral Position Sensor A Circuit High. P086D means the transmission control module (TCM) has detected an abnormally high voltage on the signal circuit for Neutral Position Sensor A, which is one of the internal range sensors that tells the computer whether the transmission is in neutral or another gear. The TCM compares this voltage against expected values and sets the code when the signal stays above the high threshold for a calibrated time, indicating an open circuit, a short to voltage, or a faulty sensor.

DTC codes / P08xx · Transmission / P086D

P086DNeutral Position Sensor A Circuit High

P086D means the transmission control module (TCM) has detected an abnormally high voltage on the signal circuit for Neutral Position Sensor A, which is one of the internal range sensors that tells the computer whether the transmission is in neutral or another gear. The TCM compares this voltage against expected values and sets the code when the signal stays above the high threshold for a calibrated time, indicating an open circuit, a short to voltage, or a faulty sensor.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.