What does code P27A0 mean?

Q: What does code P27A0 mean?

Four Wheel Drive (4WD) Range Signal Circuit High. P27A0 indicates that the four-wheel drive (4WD) control module has detected a high-voltage condition on the range signal circuit, which typically reports whether the transfer case is in high or low range. The computer expects a specific voltage window on this circuit and sets the code when the signal exceeds the upper limit, often due to an open circuit, short to voltage, or a faulty range sensor.

DTC codes / P27xx · Transmission / P27A0

P27A0Four Wheel Drive (4WD) Range Signal Circuit High

P27A0 indicates that the four-wheel drive (4WD) control module has detected a high-voltage condition on the range signal circuit, which typically reports whether the transfer case is in high or low range. The computer expects a specific voltage window on this circuit and sets the code when the signal exceeds the upper limit, often due to an open circuit, short to voltage, or a faulty range 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.