Code result
P0218
Transmission Overtemperature Condition
High severity
What it means
The TCM/PCM detected that automatic transmission fluid temperature exceeded the safe operating threshold. Continued operation accelerates wear on clutches and friction surfaces; many vehicles will engage a fail-safe mode and limit gear selection.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Low or degraded transmission fluid
highOne of the most commonly reported causes for this code — check this first.
Transmission cooler blocked or restricted
mediumA plausible cause — test and verify before replacing parts.
Sustained heavy load or towing
mediumA plausible cause — test and verify before replacing parts.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P0218 freeNo credit card required