OBD
C0012
Left Front Hydraulic Release Too Long
What it means
C0012 means Left Front Hydraulic Release Too Long.
Check these first
- Air trapped in the left front brake hydraulic circuit
- A sticking left front brake caliper or hose
- Low or contaminated brake fluid
- A failing ABS pump or left front release valve
What to do next
- Check the brake fluid level and condition
- Inspect the left front caliper and hose for sticking
- Bleed the left front brake circuit to remove air
- Read ABS release valve data with a scan tool
- Replace the left front caliper or ABS pump if faulty
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.