Traction Control System Rear Wheel Overspeed
What does C0236 mean?
The C0236 code means the vehicle's onboard diagnostic system has detected: Traction Control System Rear Wheel Overspeed. This is a moderate severity code.
Common Symptoms
- Traction control light flashing
- Reduced engine power message
- Traction control warning light stays on
- Rear wheels spinning excessively
- Vehicle hesitates during acceleration
Probable Causes (Ranked by Likelihood)
- Aggressive acceleration on slippery surface Very High
- Worn rear tires with insufficient tread High
- Rear wheel speed sensor reading incorrectly high Moderate
- Open rear differential causing one wheel to spin freely Moderate
- Traction control calibration issue Low
Step-by-Step Diagnostic Procedure
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Inspect rear tire tread depth and condition
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Compare rear wheel speeds to front wheel speeds in live data
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Check rear wheel speed sensors for debris or damage
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Test drive on dry pavement to verify code reoccurrence
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Check rear differential operation if applicable
Frequently Asked Questions
Is rear wheel overspeed normal on RWD vehicles?
Brief traction control activation during aggressive acceleration, especially in wet conditions, is normal for rear-wheel-drive vehicles. The code is set when wheel spin is excessive or persistent beyond normal limits.
Can an open differential cause this code?
Yes. Vehicles with open rear differentials send all power to the wheel with least traction. This can cause one rear wheel to spin much faster than the other, triggering the overspeed code.
Will new rear tires fix this problem?
If worn rear tires are the cause, yes. Proper tread depth significantly improves traction. On rear-wheel-drive vehicles, having good tires on the rear axle is especially important for traction.