C00A4: Driveline Control Module Rear Differential Unit B Control Circuit Driver
Standardized SAE J2012 code · C00xx 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 C00A4 mean?
Fault on driveline control module driver for rear differential unit B.
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 Internal driver fault
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of C00A4 on the same make and model first.
C00A4 in the community
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