P1812
Transmission Fluid Overtemperature
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$17–89 (est.)
Symptoms
- Burnt transmission fluid smell
- Difficulty shifting gears
- Dips or jerks when switching
- Reduced engine power
- Activation of emergency operation mode of automatic transmission
Causes
- Low transmission fluid level
- Contaminated or used ATF
- Malfunction of the automatic transmission cooling radiator
- Problems with the cooling system thermostat
- Excessive load on the transmission (towing, aggressive driving)
How to Fix
- Check the level and condition of the transmission fluid
- Replace ATF fluid and filter if necessary
- Check the operation of the transmission cooling system
- Diagnose the automatic transmission cooling radiator for blockages
- Check the operation of the engine thermostat