P0218 on Ford: How to Diagnose & Fix
Transmission Over Temperature Condition
2 Ford models · 2 documented issues · $50-$2,500 repair
P0218 on Ford by model: symptoms, diagnosis and fix
E-Series vans use rubber transmission cooler hose sections that connect the steel lines to the radiator-mounted transmission cooler. These rubber sections harden, crack, and leak transmission fluid. The leak is often slow enough that the fluid level drops gradually, causing the transmission to slip before the leak is noticed. The rubber hoses are routed near the exhaust manifold where heat accelerates degradation.
Common Symptoms
- Reddish fluid dripping from radiator area
- Transmission slipping or delayed engagement
- Burning transmission fluid smell
- Low transmission fluid level
- Transmission overheating warning
How to Fix
Replace the rubber transmission cooler line sections with silicone or braided stainless steel upgraded hoses. Use quality hose clamps rated for transmission fluid pressure. Check fluid level after repair and top off with Mercon V (or Mercon LV for 2009+). Install an auxiliary external transmission cooler if the van is used for towing.
Sources for this issue (1)
The 2020-2022 GT500's Tremec TR-9070 7-speed dual-clutch transmission overheats under sustained track use, throwing 'Transmission Too Hot' and 'Clutch Pack Too Hot' messages and derating the car (forced short-shifting / reduced output) once fluid temps climb, especially above ~90F ambient. Compounding it, the factory DCT cooler hard lines and seals are a known weak point and are widely reported to leak, risking fluid loss. Because Ford located the temperature sensor on the differential rather than the transmission itself, the DCT can heat-soak without obvious warning until it derates.
Common Symptoms
- 'Transmission Too Hot' / 'Clutch Pack Too Hot' dash warnings on track
- Forced short-shifting or reduced power (derate) when hot
- Slower/harsher shifts as fluid temperature rises
- DCT fluid leak at cooler lines/fittings
- Recovery of normal behavior after cooldown
How to Fix
Follow the GT500 manual's track maintenance: change the DCT side filter after the first track event then every 20k miles, and change differential fluid after track sessions. For repeated track use, owners add an upgraded DCT fluid cooler and replace the failure-prone factory cooler hard lines/seals with billet fittings and braided lines. Inspect cooler lines for weeping and keep DCT fluid at spec; allow cooldown laps to avoid derate.
Sources for this issue (1)
P0218 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0218 mean on a Ford?
P0218 stands for "Transmission Over Temperature Condition." This code means the transmission fluid has gotten too hot and exceeded a safe temperature limit. The transmission's temperature sensor reported an overheat condition to the computer, which can be caused by an actual overheating situation or by a faulty sensor reporting a false reading. Excessive heat is one of the most damaging things for an automatic transmission, breaking down the fluid and accelerating wear, so this code should be addressed promptly. The vehicle may enter a reduced-power or limp mode to protect the transmission. On Ford it is documented across 2 models: E-Series, Mustang.
What are the most common causes of P0218?
The most common causes of P0218 are: Low or old/degraded transmission fluid, Faulty transmission fluid temperature sensor, Clogged or restricted transmission cooler or lines, Heavy load/towing or stop-and-go driving overheating the fluid, Slipping clutches generating excess heat, Faulty cooling fan or radiator (shared cooling) issues, Internal transmission wear or restriction. The specific cause varies by vehicle.
How much does it cost to fix P0218 on a Ford?
Published repair estimates on Ford range from $50 to $2,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0218 on a different make?
View P0218 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.