What does P0218 mean?
The transmission fluid is hotter than it should be. Heat is the main thing that kills automatic transmissions.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Transmission temperature warning
- Harsh or late shifts
- Burnt fluid smell
Common causes
- Towing or heavy load in hot weather
- Low fluid
- Clogged transmission cooler
- Torque converter slipping
- Faulty temperature sensor
How to diagnose P0218
- Check fluid level and condition.
- Check the transmission cooler and lines.
- Compare the temperature reading with real temperature.
How to fix it
- Service the fluid
- Repair the cooler
- Add an auxiliary cooler for heavy towing
- Replace the temperature sensor
Estimated repair cost
Likely repairs for P0218 run from about $150 to $450, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Transmission fluid and filter service | $150 - $400 |
| Transmission fluid temperature sensor | $150 - $450 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0218?
High severity
Pull over and let it cool. Continuing to drive with hot fluid can wreck the transmission.
P0218 FAQ
What does P0218 mean?
P0218 stands for "Transmission Fluid Over Temperature Condition". The transmission fluid is hotter than it should be.
Can I drive with a P0218 code?
Pull over and let it cool. Continuing to drive with hot fluid can wreck the transmission.
How much does it cost to fix P0218?
It depends on the cause. The likely repairs for P0218 range from about $150 to $450 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0218?
The most common causes are: towing or heavy load in hot weather; low fluid; clogged transmission cooler.