Code Definition

C0201 — ABS Enable Relay Contact Circuit

System: Chassis  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About C0201

C0201 is a generic (obd-ii standard) chassis diagnostic trouble code. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

When C0201 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

Because C0201 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Anti lock Brake System (ABS) control module commands the ABS enable relay to supply battery voltage to the ABS hydraulic control unit, the pump motor circuit, and the solenoid valve power feeds. DTC C0201 is set when the ABS module monitors the relay contact output side and detects an open circuit, excessive voltage drop, or a voltage state that does not match the commanded relay position. This indicates a fault in the relay contact circuit preventing proper ABS system power up. Driver symptoms typically include an illuminated ABS warning light, an illuminated brake warning light on some a...

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