Engine-Codes - Buick - P0971 BUICK

P0971 BUICK - Pressure Control Solenoid Valve 3 Control Circuit High Voltage

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

P0971 BUICK Possible Causes

  • Faulty Pressure Control Solenoid Valve 3
  • Pressure Control Solenoid Valve 3 harness is open or shorted
  • Pressure Control Solenoid Valve 3 circuit poor electrical connection

How is the P0971 BUICK 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 BUICK code

Labor: 1.0

The cost to diagnose the P0971 BUICK 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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Possible Symptoms

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

P0971 BUICK Meaning

The clutch pressure control (PC) solenoid 3 is part of the control solenoid valve assembly which has no serviceable components. The normally high clutch PC solenoid 3 regulates and directs oil pressure to the R1/4-5-6 regulator valve. Increasing clutch PC solenoid 3 pressure increases pressure to the low and reverse clutch or 4-5-6 clutch, depending on the position of the clutch select valve. The transmission control module (TCM) PC Solenoid 3 low side driver varies current to the solenoid. Decreasing the current to clutch PC solenoid 3 increases oil pressure by closing off the solenoid exhaust port. Increasing the current to the clutch PC solenoid 3 decreases oil pressure by opening the exhaust port. Clutch PC solenoid 3 power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive current flow. If an excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will reset.

More Information

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