OBD Guide
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C12E2

Electronic Brake Control Module Supply Circuit High Voltage

C12E2 is an OBD-II diagnostic trouble code meaning: Electronic Brake Control Module Supply Circuit High Voltage. Common causes: generator fault (overcharging), relay or fuse problems. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine light comes on
  • Unstable operation of the brake system
  • Loss of braking efficiency
  • Disabling the ABS or ESP system

Causes

  • Generator fault (overcharging)
  • Relay or fuse problems
  • Short circuit in wiring harness
  • EBCM module malfunction

How to Fix

  1. Check the voltage at the battery terminals with the engine running
  2. Inspect the EBCM wiring harness and connectors for damage.
  3. Check relays and fuses associated with EBCM
  4. Test the generator for overcharging
  5. Replace EBCM if necessary

Related codes

C12E1C12E3P0562P0563

FAQ

What does the C12E2 code mean?

C12E2 is an OBD-II diagnostic trouble code that indicates: Electronic Brake Control Module Supply Circuit High Voltage

What causes a C12E2 error code?

The most common causes of C12E2 include: Generator fault (overcharging); Relay or fuse problems; Short circuit in wiring harness; EBCM module malfunction.

How do I fix a C12E2 diagnostic trouble code?

To fix C12E2: Check the voltage at the battery terminals with the engine running. Inspect the EBCM wiring harness and connectors for damage.. Check relays and fuses associated with EBCM. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C12E2?

Limited driving only, diagnose soon

How much does it cost to fix C12E2?

The estimated repair cost for C12E2 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat