For Shop Owners

P0971 - Pressure Control Solenoid 'C' Control Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Faulty Pressure Control Solenoid 'C'
  • Pressure Control Solenoid 'C' harness is open or shorted
  • Pressure Control Solenoid 'C' circuit poor electrical connection
What does this mean?

When is the code detected?

The Transmission Control Module (TCM) has detected an internal low voltage electrical malfunction of the Pressure Control (PC) solenoid control circuit

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0971 Description

The Pressure Control (PC) Solenoid Valve an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the PC solenoid valve, which ultimately decreases line pressure. The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM).
OBDII Code P0971 - Pressure Control Solenoid 'C' Control Circuit High -

P0971 Information for specific makes

P0971 ACURA Problem in A/T Clutch Pressure Control Solenoid Valve 'C' Circuit High
P0971 BUICK Pressure Control Solenoid Valve 3 Control Circuit High Voltage
P0971 CADILLAC Pressure Control Solenoid Valve 3 Control Circuit High Voltage
P0971 CHEVROLET Pressure Control Solenoid Valve 3 Control Circuit High Voltage
P0971 DODGE Pressure Control Solenoid 'C' Control Circuit High
P0971 GMC Pressure Control Solenoid Valve 3 Control Circuit High Voltage
P0971 HONDA Problem in A/T Clutch Pressure Control Solenoid Valve 'C' Circuit High
P0971 PONTIAC Pressure Control Solenoid Valve 3 Control Circuit High Voltage
P0971 SATURN Pressure Control Solenoid Valve 3 Control Circuit High Voltage

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P0971 Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0971 code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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