P0971

What it means

Voltage on the pressure control solenoid C control line is above the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.

Is it safe to drive?

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.

Most likely causes

• Control wire shorted to B+

  high

  One of the most commonly reported causes for this code — check this first.

• Open coil

  medium

  A plausible cause — test and verify before replacing parts.

• Connector pins corroded - high contact resistance

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full P0971 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?