C055BABS Pump Motor Supply Voltage Circuit A Low
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Supply voltage A of the pump motor is below its lower limit. Under load the motor pulls the feed down, so a weak 12 V battery, a corroded terminal, a high-resistance fusible link or a poor ground can all set it, and the relay may chatter. No maker publishes C055B. On the 2023 Outlander PHEV Mitsubishi specifies 10–16 V at the motor feed and flags an ignition supply of 10 V or less at its brake unit within 1 s under C1056-16, a code without generic equivalent. A patent originally filed by AlliedSignal and now owned by Bosch flags its own fault if the motor sits under roughly 7 V at shut-off, and a Hitachi patent for electric brake actuators limits motor current once the vehicle supply falls under a set level. Charge and test the battery before replacing parts.
- What you may notice
- ABS and ESC warning lamps on, often after cold starts
- Pump runs sluggishly or ABS functions drop out
- Likely causes
- LikelyWeak or discharged 12 V battery
- PossibleCorroded terminal or high-resistance fusible link in the motor feed
- PossiblePoor ground connection of the ABS unit
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.