C1209
ABS Rear Isolation Valve Circuit Short To Ground
C1209 is an OBD-II diagnostic trouble code meaning: ABS Rear Isolation Valve Circuit Short To Ground. Common causes: wiring harness damage, abs rear circuit isolation valve malfunction. Estimated repair cost: $56–167.
Symptoms
- ABS light is on
- Reduced braking performance
- ABS activation during normal braking
Causes
- Wiring harness damage
- ABS rear circuit isolation valve malfunction
- Problems in the ABS control unit
- Short circuit to ground
How to Fix
- Check wiring harness for damage
- Check the resistance of the ABS rear circuit isolation valve
- Check the ABS control unit for errors
- Replace faulty components
Related codes
FAQ
What does the C1209 code mean?
C1209 is an OBD-II diagnostic trouble code that indicates: ABS Rear Isolation Valve Circuit Short To Ground
What causes a C1209 error code?
The most common causes of C1209 include: Wiring harness damage; ABS rear circuit isolation valve malfunction; Problems in the ABS control unit; Short circuit to ground.
How do I fix a C1209 diagnostic trouble code?
To fix C1209: Check wiring harness for damage. Check the resistance of the ABS rear circuit isolation valve. Check the ABS control unit for errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1209?
Limited driving only, diagnose soon
How much does it cost to fix C1209?
The estimated repair cost for C1209 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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