C2104 fault code: what it means

C2104: ABS valve power supply circuit fault. ABS/ASC disabled.

Chassis (brakes, steering, suspension) · Costly if missed

Usual causes, most likely first

1. ABS valve fuse or wiring
2. hydraulic unit

C2104 by make

What the repair usually costs

• ABS pump / control module replacement (reman exchange or new)NZ$850–NZ$3,210 · A$780–A$2,880

Not sure what C2104 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.