C00A4
Driveline Control Module Rear Differential Unit B Control Circuit Driver
C00A4 is an OBD-II diagnostic trouble code meaning: Driveline Control Module Rear Differential Unit B Control Circuit Driver. Common causes: open or short circuit in wiring harness, control solenoid malfunction. Estimated repair cost: $56–167.
Symptoms
- Unstable operation of the rear differential
- Check Engine Light Illuminates
- Reduced efficiency of the all-wheel drive system
Causes
- Open or short circuit in wiring harness
- Control solenoid malfunction
- Problems with the rear differential control module
- Contact corrosion
How to Fix
- Check the wiring harness for opens and shorts
- Check control solenoid resistance
- Diagnose the rear differential control module
- Replace faulty components
Related codes
Error C00A4 by Vehicle Brand
FAQ
What does the C00A4 code mean?
C00A4 is an OBD-II diagnostic trouble code that indicates: Driveline Control Module Rear Differential Unit B Control Circuit Driver
What causes a C00A4 error code?
The most common causes of C00A4 include: Open or short circuit in wiring harness; Control solenoid malfunction; Problems with the rear differential control module; Contact corrosion.
How do I fix a C00A4 diagnostic trouble code?
To fix C00A4: Check the wiring harness for opens and shorts. Check control solenoid resistance. Diagnose the rear differential control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C00A4?
Limited driving only, diagnose soon
How much does it cost to fix C00A4?
The estimated repair cost for C00A4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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