P0778
Pressure Control Solenoid B Electrical
General electrical fault on the pressure control solenoid B circuit — open coil, short to ground or battery, or driver feedback outside the expected range.
General electrical fault on the pressure control solenoid B circuit — open coil, short to ground or battery, or driver feedback outside the expected range.
Common causes
- high
Open solenoid coil
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-1650
- medium
Damaged wiring at the transmission case connector
A plausible cause — test and verify before replacing parts.
Typical part cost: $220-1650
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P0778 mean?
P0778 means "Pressure Control Solenoid B Electrical". It is a generic OBD-II code that points to a fault in the transmission.
What are the most common causes of P0778?
open solenoid coil; damaged wiring at the transmission case connector — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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