OBD-II code · Chassis
C0023 ABS Pump Motor Circuit High
Voltage on the pump motor control line is above the expected range, typically caused by a short to battery voltage or a stuck relay.
Is it safe to drive with C0023?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWiring shorted to battery voltage
- PossibleRelay contacts welded closed
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3 h
- Emissions test
- Usually unaffected
- Parts involved
- ABS Pump Motor, Pump Motor Relay, Control Wiring
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.