OBD Guide

C05A8

ABS Pump Motor Supply Voltage B Circuit Range/Performance

C05A8 is an OBD-II diagnostic trouble code meaning: ABS Pump Motor Supply Voltage B Circuit Range/Performance. Common causes: faulty abs pump relay, blown fuse. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The ABS indicator on the dashboard is on
  • Reduced braking performance
  • Unusual noises from the ABS unit

Causes

  • Faulty ABS pump relay
  • Blown fuse
  • Wiring harness damage
  • Low battery voltage
  • ABS pump motor malfunction

How to Fix

  1. Check battery and generator voltage
  2. Inspect ABS pump fuses and relays
  3. Check the integrity of the wiring harness
  4. Test the ABS pump motor
  5. Replace faulty components

Related codes

Error C05A8 by Vehicle Brand

FAQ

What does the C05A8 code mean?

C05A8 is an OBD-II diagnostic trouble code that indicates: ABS Pump Motor Supply Voltage B Circuit Range/Performance

What causes a C05A8 error code?

The most common causes of C05A8 include: Faulty ABS pump relay; Blown fuse; Wiring harness damage; Low battery voltage.

How do I fix a C05A8 diagnostic trouble code?

To fix C05A8: Check battery and generator voltage. Inspect ABS pump fuses and relays. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C05A8?

Limited driving only, diagnose soon

How much does it cost to fix C05A8?

The estimated repair cost for C05A8 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat