C001A
Left Rear Hydraulic Release Too Long
C001A is an OBD-II diagnostic trouble code meaning: Left Rear Hydraulic Release Too Long. Common causes: wedging of the brake caliper or guides, brake pad/disc wear. Estimated repair cost: $33–167.
Symptoms
- The ABS/ESP warning light comes on
- Increased braking distance
- Uneven wear on rear brake pads
- Unstable operation of the ABS system when braking
Causes
- Wedging of the brake caliper or guides
- Brake pad/disc wear
- ABS hydraulic valve malfunction
- Brake fluid contamination
- Air in the brake system
- Damage to the wiring harness to the rear brake
How to Fix
- Check the condition of the brake pads and discs
- Make sure the caliper moves freely and the guides are cleaned
- Diagnose the ABS hydraulic module
- Check the level and condition of the brake fluid
- Bleed the brake system
- Check the integrity of the wiring harness to the rear wheels
Related codes
Error C001A by Vehicle Brand
FAQ
What does the C001A code mean?
C001A is an OBD-II diagnostic trouble code that indicates: Left Rear Hydraulic Release Too Long
What causes a C001A error code?
The most common causes of C001A include: Wedging of the brake caliper or guides; Brake pad/disc wear; ABS hydraulic valve malfunction; Brake fluid contamination.
How do I fix a C001A diagnostic trouble code?
To fix C001A: Check the condition of the brake pads and discs. Make sure the caliper moves freely and the guides are cleaned. Diagnose the ABS hydraulic module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C001A?
Limited driving only, diagnose soon
How much does it cost to fix C001A?
The estimated repair cost for C001A is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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