P0218: Transmission Over Temperature Condition
8 vehicles · 6 makes · $50-$5,000 repair
Most Reported On
P0218 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2000-2014 Ford E-Series, 2012-2021 Nissan NV, and 1999-2002 Chrysler Prowler, plus 5 other vehicles, with repair costs ranging from $50 to $5,000.
Common Causes
Typical Repair Cost
Based on 8 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0218, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (8)
FAQ
What does P0218 mean?
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.
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?
Repair costs for P0218 range from $50 to $5,000, depending on the vehicle and root cause.
Which vehicles are affected by P0218?
Au7o has documented P0218 across 8 vehicle models from 6 manufacturers: Chevrolet, Chrysler, Dodge, Ford, Nissan, Ram.
Sources (12)
- ForumTransmission fluid in radiator - RamForum.com
- ForumCoolant leak around transmission - RamForum.com
- Forum2019 Ram 1500 trans fluid in coolant - JustAnswer
- ForumTransmission cooler lines leaking — Chevy Silverado and GMC Sierra Forum
- article6L80E Overheating Problems: Why It Happens and How to Prevent It — Monster Transmission
- ForumSOLVED! - Sudden loss of 3rd/4th gear - GMTNation
- ForumTransmission not shifting into 3rd - Tahoe Yukon Forum
- articleMost Common 4L60E Transmission Problems & How to Fix Them
- article2008-2024 Nissan & Infiniti Transmission Oil Cooler: Fixing CVT Overheating and Failure (Go-Parts.com)
- ForumTransmission overheating (Nissan Forum / NICOclub)
- ForumCVT Auxiliary Cooler Install (Nissan Forum / NICOclub)
- videoYouTube - Transmission Cooler Line Replacement on Dodge Grand Caravan (Known Channel)
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.