C1101 fault code: what it means

C1101: Kia ABS: battery voltage high.

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

Usual causes, most likely first

charging system overvoltage
ABS supply

C1101 by make

Kia

Kia ABS: battery voltage high.

Usual causes: charging system overvoltage; ABS supply

Nissan

ABS wheel speed sensor circuit fault, rear right wheel (open/short or low supply). ABS, VDC and traction lights come on; normal brakes still work.

Usual causes: wheel speed sensor faulty; sensor wiring damaged or connector corroded; ABS actuator/control unit

What the repair usually costs

Alternator replace (small / medium car, petrol)NZ$510–NZ$1,020 · A$480–A$1,000
ABS wheel speed sensor replace, one wheelNZ$130–NZ$610 · A$130–A$590

Not sure what C1101 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.