What does code P2774 mean?

Q: What does code P2774 mean?

Four Wheel Drive (4WD) Low Switch Circuit High. P2774 means the four-wheel-drive (4WD) control module has detected an abnormally high voltage on the circuit that reports the status of the 4WD low range switch. The module expects the switch to pull the signal line low when 4WD low is engaged, and a high voltage tells it the switch circuit is open, shorted to power, or the switch itself has failed.

DTC codes / P27xx · Transmission / P2774

P2774Four Wheel Drive (4WD) Low Switch Circuit High

P2774 means the four-wheel-drive (4WD) control module has detected an abnormally high voltage on the circuit that reports the status of the 4WD low range switch. The module expects the switch to pull the signal line low when 4WD low is engaged, and a high voltage tells it the switch circuit is open, shorted to power, or the switch itself has failed.

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.