P0977: Shift Solenoid B Control Circuit High
What to do
Expect specific gears to be missing. Ask for the winding to be measured first.
What this code means
Shift solenoid B's control circuit reads above its valid range — an open circuit or a short to supply. Measuring the winding separates the solenoid from its harness.
Likely causes
Start here
- Open circuit in solenoid wiring · moderate
- Failed shift solenoid · moderate
- Corroded transmission connector · moderate
Less common
- Wiring shorted to voltage · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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