P078E
Shift Timing Solenoid B Intermittent
Shift timing solenoid B signal jumps or drops out.
Shift timing solenoid B signal jumps or drops out.
Common causes
- high
Loose connector at the transmission
One of the most commonly reported causes for this code — check this first.
Typical part cost: $220-1100
- low
Connector with intermittent contact under vibration
Less common, but worth ruling out after the more likely causes.
Typical part cost: $220-1100
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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 P078E mean?
P078E means "Shift Timing Solenoid B Intermittent". It is a generic OBD-II code that points to a fault in the transmission.
What are the most common causes of P078E?
loose connector at the transmission; connector with intermittent contact under vibration; harness routed against vibrating component — 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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