C05F4: Rear Drive Shaft Speed Sensor Circuit Range/Performance
Standardized SAE J2012 code · C05xx codes
Safety-critical system. Faults in airbags, brakes, steering or high-voltage components can put people at risk. Follow the manufacturer's service information and safety procedures, or have the vehicle checked by a qualified workshop.
What does C05F4 mean?
Rear drive shaft speed sensor reading implausible. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
- High Sensor reading drifted
- Low Sensor element aged beyond calibration window
- Low Sensor mounting loose - signal damping
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of C05F4 on the same make and model first.
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