OBD Guide
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C2312

Power Source Control ECU Communication Line Malfunction

C2312 is an OBD-II diagnostic trouble code meaning: Power Source Control ECU Communication Line Malfunction. Common causes: broken or damaged wiring harness, oxidation or corrosion of contacts. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of electronic systems
  • Check Engine Light Illuminates
  • Problems starting the engine
  • Malfunctions of on-board electronics

Causes

  • Broken or damaged wiring harness
  • Oxidation or corrosion of contacts
  • Malfunction of the power supply control unit
  • Grounding problems
  • Short circuit in communication circuit

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect and clean contacts
  3. Check the grounding of the control unit
  4. Test the power supply control unit
  5. Replace damaged components if necessary

Related codes

U0100U0121U0140

FAQ

What does the C2312 code mean?

C2312 is an OBD-II diagnostic trouble code that indicates: Power Source Control ECU Communication Line Malfunction

What causes a C2312 error code?

The most common causes of C2312 include: Broken or damaged wiring harness; Oxidation or corrosion of contacts; Malfunction of the power supply control unit; Grounding problems.

How do I fix a C2312 diagnostic trouble code?

To fix C2312: Check the integrity of the wiring harness. Inspect and clean contacts. Check the grounding of the control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2312?

Limited driving only, diagnose soon

How much does it cost to fix C2312?

The estimated repair cost for C2312 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat