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.
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.
Common causes
- high
Pump motor seized after long inactivity
One of the most commonly reported causes for this code — check this first.
Typical part cost: $330-1540
- medium
Pump motor relay welded or open
A plausible cause — test and verify before replacing parts.
Typical part cost: $330-1540
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does C0020 mean?
C0020 means "ABS Pump Motor Circuit". It is a generic OBD-II code that points to a fault in the chassis.
What are the most common causes of C0020?
pump motor seized after long inactivity; pump motor relay welded or open; power supply connection corroded — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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