Engine-Codes - Generic - P0971

P0971 - Pressure Control Solenoid 'C' Control Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0971 Possible Causes

  • Faulty Pressure Control Solenoid 'C'
  • Pressure Control Solenoid 'C' harness is open or shorted
  • Pressure Control Solenoid 'C' circuit poor electrical connection

How is the P0971 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P0971 code

Labor: 1.0

The cost to diagnose the P0971 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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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 Meaning

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).

More Information

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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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