Electronic Power Steering Motor Overtemperature
What does C0246 mean?
The C0246 code means the vehicle's onboard diagnostic system has detected: Electronic Power Steering Motor Overtemperature. This is a moderate severity code.
Common Symptoms
- Power steering warning light on
- Steering assist reduces or disappears
- Steering heaviness increases gradually
- Warning may clear after vehicle cools down
- EPS warning message on dashboard
Probable Causes (Ranked by Likelihood)
- Sustained heavy steering effort overheating the motor Very High
- Repeated full-lock steering maneuvers High
- EPS motor internal resistance increasing with wear Moderate
- Poor ventilation or heat shielding around motor Moderate
- EPS control module temperature sensor fault Low
Step-by-Step Diagnostic Procedure
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Allow the system to cool down and check if steering assist returns
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Monitor EPS motor temperature in live data during normal driving
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Check for excessive steering effort due to binding, low tire pressure, or alignment issues
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Inspect for debris blocking airflow around the EPS motor
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Verify proper tire inflation -- underinflated tires increase steering effort significantly
Frequently Asked Questions
Why does my power steering cut out when parking?
Parking involves sustained full-lock steering at low speeds, which puts maximum load on the EPS motor. This generates the most heat and can trigger the overtemperature protection, temporarily disabling assist.
Will the steering come back after it cools down?
Usually yes. The overtemperature protection is designed to prevent motor damage. Once the motor cools sufficiently, steering assist should return. If it does not, there may be a more serious issue.
Can low tire pressure cause EPS overheating?
Yes. Underinflated tires require significantly more steering effort, which makes the EPS motor work harder and generate more heat. Always maintain proper tire pressure.