CUSTOMER CONCERN Customer states the steering wheel shakes slightly by itself while the vehicle is running and the wheel is centered. DTC B2278 is stored. CAUSE Power-steering testing confirmed a malfunctioning steering-shaft torque sensor. CORRECTION Remove and replace steering-shaft torque sensor. Perform steering-angle and torque-sensor calibration, clear DTC B2278 and verify steering operation.

CUSTOMER CONCERN Customer states electric power steering assist is inoperative and the PSCM stores DTC C2792. CAUSE Power and ground circuit testing confirmed an internal Power Steering Control Module fault. CORRECTION Remove and replace Power Steering Control Module. Program and configure replacement module as required.