OBD Guide
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C12A7

ABS Brake Boost Solenoid Valve Circuit Performance

C12A7 is an OBD-II diagnostic trouble code meaning: ABS Brake Boost Solenoid Valve Circuit Performance. Common causes: open or short circuit in wiring harness, brake booster solenoid malfunction. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Unstable ABS operation
  • Increased braking distance
  • ABS warning light on the instrument panel comes on

Causes

  • Open or short circuit in wiring harness
  • Brake booster solenoid malfunction
  • Problems with the ABS control unit
  • Solenoid dirty or stuck

How to Fix

  1. Check wiring harness for damage
  2. Check solenoid resistance
  3. Clean or replace solenoid if necessary
  4. Scan the ABS control unit for other errors

Related codes

C12A8C12A9C12B0

FAQ

What does the C12A7 code mean?

C12A7 is an OBD-II diagnostic trouble code that indicates: ABS Brake Boost Solenoid Valve Circuit Performance

What causes a C12A7 error code?

The most common causes of C12A7 include: Open or short circuit in wiring harness; Brake booster solenoid malfunction; Problems with the ABS control unit; Solenoid dirty or stuck.

How do I fix a C12A7 diagnostic trouble code?

To fix C12A7: Check wiring harness for damage. Check solenoid resistance. Clean or replace solenoid if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C12A7?

Limited driving only, diagnose soon

How much does it cost to fix C12A7?

The estimated repair cost for C12A7 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat