C0012Left Front Hydraulic Release Too Long
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Set when the ABS modulator cannot release pressure at the left front wheel within the expected time during a control cycle. Rather than a pure electrical fault it is a performance or plausibility code: after the module commands the left front outlet valve to dump pressure, it expects wheel speed to recover and pressure to fall; if the release takes longer than the calibrated limit the module concludes the hydraulic path is restricted, the valve is sticking or the pump/accumulator cannot accept fluid. ABS and stability control are disabled and the ABS lamp is set. No manufacturer documents this code publicly. NHTSA describes ABS control as a hold, release and reapply cycle, and a patent explains that a well-filled low-pressure accumulator can keep the outlet valves from lowering pressure as demanded.
- What you may notice
- ABS warning lamp on
- ABS and stability control disabled
- Extended or firm pedal during hard braking
- Likely causes
- LikelyOutlet valve sticking or slow
- PossibleRestricted hydraulic path or contaminated fluid
- RarePump or accumulator cannot accept fluid
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €300 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.