2017-10-10
Harsh or delayed shifting
Transmission slips or fails to engage gears
Check engine light illuminated
Reduced fuel efficiency
Open or shorted wiring in the pressure control solenoid 'C' circuit
Failed pressure control solenoid 'C'
Malfunctioning engine control module (ECM)
Pressure Control Solenoid: This solenoid regulates the oil flow in the transmission. Problems with this solenoid lead to engine misfire, poor fuel economy, poor acceleration
Inspect and repair any damaged wiring or connections in the pressure control solenoid 'C' circuit
Replace the pressure control solenoid 'C'
Replace the engine control module (ECM) if necessary
See which problems come with P0971, how often it shows up in other vehicles, and how to fix it — step by step. Free on OBD DashX, in 10 languages.
See P0971 on OBD DashX