OBD2 code C0020: ABS Pump Motor Circuit
The ABS control module detects an electrical fault in the pump motor circuit.
Detected Root Component
Chassis Component
Observed Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Possible Causes
- Pump motor seized after long inactivity
- Pump motor relay welded or open
- Power supply connection corroded
Tools Required
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Parts likely to be the cause (Capteur ABS)
Capteur ABS
Photo d'illustration : Capteur ABS
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Frequently asked questions about code C0020
What does code C0020 mean? ▾
OBD2 code C0020: ABS Pump Motor Circuit. The ABS control module detects an electrical fault in the pump motor circuit.
What are the symptoms of code C0020? ▾
Code C0020 may cause: ABS warning light on, ESC/stability control deactivated, Possible reduced brake assist, Speedometer may behave erratically. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code C0020? ▾
The most common causes of code C0020 are: Pump motor seized after long inactivity, Pump motor relay welded or open, Power supply connection corroded. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code C0020? ▾
Yes, code C0020 is critical (Critical). Avoid driving and consult a professional promptly to prevent major damage.
How do I fix code C0020? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Pump motor seized after long inactivity, Pump motor relay welded or open, Power supply connection corroded. Difficulty: Medium · Estimated time: 30-60min.