P0971 Fault Code

Pressure Control Solenoid C Control Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

• The P0971 code indicates an issue with the Pressure Control Solenoid C control circuit.
• This code specifically points to a condition where the circuit is sensing a higher than expected voltage, suggesting a malfunction in the solenoid or its control circuit.
• The solenoid plays a crucial role in regulating fluid pressure within the transmission system, affecting overall performance.

What are the symptoms of the P0971 code?

• The most prominent symptom of a P0971 code is erratic shifting of the transmission, which may lead to hard shifts or slipping.
• Drivers may notice poor acceleration or delayed engagement when shifting into gear.
• In some cases, the vehicle may display a warning light on the dashboard, indicating a problem with the transmission.

What causes the P0971 code?

• Common causes for this fault include a defective Pressure Control Solenoid C, wiring issues, or a faulty transmission control module (TCM).
• Corroded or damaged connectors can also contribute to this fault, affecting signal transmission.
• Additionally, low transmission fluid levels or contamination could impact solenoid operation.

How to fix P0971?

• Start by visually inspecting the wiring and connectors related to the Pressure Control Solenoid C for any signs of wear or damage.
• Test the solenoid using a multimeter to check for proper resistance values; replace if necessary.
• If the solenoid is functional, inspect the transmission fluid level and condition, and change if it is low or contaminated.
• Finally, reset the trouble codes and take the vehicle for a test drive to see if the issue persists.