OBD Guide
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C1178

ABS Active Brake Booster

C1178 is an OBD-II diagnostic trouble code meaning: ABS Active Brake Booster. Common causes: abs sensor malfunction, wiring harness problems. Estimated repair cost: $56–167.

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

Symptoms

  • Reduced braking performance
  • ABS light is on
  • Unusual behavior of the brake pedal

Causes

  • ABS sensor malfunction
  • Wiring Harness Problems
  • Solenoid valve malfunction
  • Error in ABS control unit

How to Fix

  1. Check ABS sensors for damage
  2. Inspect the wiring harness for breaks or corrosion.
  3. Check solenoid valves
  4. Scan the ABS control unit for errors
  5. Replace faulty components

Related codes

C1180C1185C1190

FAQ

What does the C1178 code mean?

C1178 is an OBD-II diagnostic trouble code that indicates: ABS Active Brake Booster

What causes a C1178 error code?

The most common causes of C1178 include: ABS sensor malfunction; Wiring Harness Problems; Solenoid valve malfunction; Error in ABS control unit.

How do I fix a C1178 diagnostic trouble code?

To fix C1178: Check ABS sensors for damage. Inspect the wiring harness for breaks or corrosion.. Check solenoid valves. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1178?

Limited driving only, diagnose soon

How much does it cost to fix C1178?

The estimated repair cost for C1178 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat