C05A9
ABS Pump Motor Supply Voltage Circuit A/B Correlation
C05A9 is an OBD-II diagnostic trouble code meaning: ABS Pump Motor Supply Voltage Circuit A/B Correlation. Common causes: poor contact in the abs pump connectors, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- ABS light is on
- The ABS system does not activate correctly
- Loss of braking efficiency
Causes
- Poor contact in the ABS pump connectors
- Open or short circuit in wiring harness
- ABS pump motor malfunction
- Problems with the ABS control unit
How to Fix
- Check the connectors and wiring harness of the ABS pump
- Measure the voltage on circuits A and B
- Replace the faulty component (pump, wiring, control unit)
Related codes
Error C05A9 by Vehicle Brand
FAQ
What does the C05A9 code mean?
C05A9 is an OBD-II diagnostic trouble code that indicates: ABS Pump Motor Supply Voltage Circuit A/B Correlation
What causes a C05A9 error code?
The most common causes of C05A9 include: Poor contact in the ABS pump connectors; Open or short circuit in wiring harness; ABS pump motor malfunction; Problems with the ABS control unit.
How do I fix a C05A9 diagnostic trouble code?
To fix C05A9: Check the connectors and wiring harness of the ABS pump. Measure the voltage on circuits A and B. Replace the faulty component (pump, wiring, control unit). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C05A9?
Limited driving only, diagnose soon
How much does it cost to fix C05A9?
The estimated repair cost for C05A9 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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