C0236 moderate

Traction Control System Rear Wheel Overspeed

The C0236 code means the vehicle's onboard diagnostic system has detected: Traction Control System Rear Wheel Overspeed. This is a moderate severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $0 - $500 (parts and labor)

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BlueDriver Bluetooth Pro Scanner

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Read ABS Codes

LAUNCH CRP123X (Reads ABS + Chassis)

Basic scanners cannot read ABS codes. This one reads all four systems so you know exactly which sensor failed.

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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

Inspect rear tire tread depth and condition
Compare rear wheel speeds to front wheel speeds in live data
Check rear wheel speed sensors for debris or damage
Test drive on dry pavement to verify code reoccurrence
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.