What does code P0218 mean?

Q: What does code P0218 mean?

Transmission Over-Temperature Condition. P0218 indicates that the transmission control module (TCM) has detected a transmission fluid temperature that exceeds a calibrated threshold, typically around 150°C (302°F). The computer sets this code when the temperature sensor inside the transmission reports an over-temperature condition for a sustained period, often triggering a fail-safe mode to protect internal components.

DTC codes / P02xx · Fuel and air metering (injector circuits) / P0218

P0218Transmission Over-Temperature Condition

P0218 indicates that the transmission control module (TCM) has detected a transmission fluid temperature that exceeds a calibrated threshold, typically around 150°C (302°F). The computer sets this code when the temperature sensor inside the transmission reports an over-temperature condition for a sustained period, often triggering a fail-safe mode to protect internal components.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.