OBD-II code · Chassis
C0020 ABS Pump Motor Circuit
The ABS control module detects an electrical fault in the pump motor circuit. Without a working pump, the system cannot build hydraulic pressure for ABS or stability control interventions and disables those functions.
Is it safe to drive with C0020?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyPump motor seized after long inactivity
- PossiblePump motor relay welded or open
- PossiblePower supply connection corroded
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–5 h
- Emissions test
- Usually unaffected
- Parts involved
- ABS Pump Motor, ABS Control Module, Pump Motor Relay, Power Supply Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.