P07FF
Cold Start Transmission Performance
During the cold-start phase the transmission does not behave to specification — typically very slow shifts, missed shifts or harsh engagement at low ATF temperature. Common causes are degraded ATF (lost cold-flow viscosity), a stuck thermostat or aged solenoid drivers.
During the cold-start phase the transmission does not behave to specification — typically very slow shifts, missed shifts or harsh engagement at low ATF temperature. Common causes are degraded ATF (lost cold-flow viscosity), a stuck thermostat or aged solenoid drivers.
Common causes
- high
Degraded ATF without cold-flow reserve
One of the most commonly reported causes for this code — check this first.
Typical part cost: $170-880
- medium
Stuck transmission fluid thermostat
A plausible cause — test and verify before replacing parts.
Typical part cost: $170-880
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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
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Frequently asked questions
What does P07FF mean?
P07FF means "Cold Start Transmission Performance". It is a generic OBD-II code that points to a fault in the transmission.
What are the most common causes of P07FF?
degraded atf without cold-flow reserve; stuck transmission fluid thermostat — 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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