The P0218: Transmission Over Temperature Condition indicates that the transmission is operating at an excessively high temperature. This can be caused by a variety of issues, including overheating, low transmission fluid levels, a faulty temperature sensor, or blockages in the transmission cooler. When this code appears, it is crucial to address it promptly to avoid serious damage to the transmission.
P0218 – Quick Overview
| Meaning | P0218: Transmission Over Temperature Condition |
| Is it serious? | Yes, this code is serious as it indicates the transmission is overheating, which can lead to transmission failure if not addressed promptly. |
| Possible causes | – Transmission overheating – Low transmission fluid levels – Faulty transmission fluid temperature sensor – Blocked transmission cooler |
| How to diagnose? | – Check transmission fluid levels and top up if necessary. – Inspect the transmission fluid temperature sensor for proper operation. – Inspect the transmission cooler for blockages. – Replace or repair any faulty components. |
P0218 Meaning
The P0218: Transmission Over Temperature Condition code indicates that the transmission is running too hot. This could be due to low fluid levels, a malfunctioning temperature sensor, or blockages in the transmission cooler. If this code is triggered, it suggests that the transmission is at risk of overheating, which could cause severe damage or complete transmission failure.
Step-by-step diagnostic guide
Follow the outline procedure to diagnose this DTC by eliminating possible causes one by one.
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check if there are any other related codes present. These might give additional clues about the problem. | OBD-II Scanner |
| Check Transmission Fluid Levels | Inspect the transmission fluid levels. If they are low, top up with the recommended transmission fluid. | Transmission Fluid, Dipstick |
| Inspect the Transmission Fluid Temperature Sensor | Test the transmission fluid temperature sensor using a scan tool to ensure it is functioning correctly. Replace if necessary. | Scan Tool, Multimeter |
| Inspect the Transmission Cooler | Visually inspect the transmission cooler for any blockages or damage that could be restricting fluid flow. | Flashlight, Safety Gloves |
| Replace or Repair Faulty Components | If any components, such as the temperature sensor or cooler, are found to be faulty, replace or repair them as needed. | Replacement Parts, Multimeter |
| Clear the Code and Test Drive | After completing the necessary repairs, clear the P0218 code using the OBD-II scanner. Take the vehicle for a test drive to ensure the issue is resolved and the code does not return. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P0218 code has not reappeared. If the code returns, further diagnosis may be required. | OBD-II Scanner |
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Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)