OBD Guide
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B2A0C

DCM Internal Fault

B2A0C is an OBD-II diagnostic trouble code meaning: DCM Internal Fault. Common causes: dcm software failure, damage to internal module components. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–556 (est.)

Symptoms

  • Airbag light is on
  • The passive safety system does not work
  • Error does not go away after reset

Causes

  • DCM software failure
  • Damage to internal module components
  • Module power problems
  • Short circuit in wiring harness
  • Contact corrosion

How to Fix

  1. Check DCM wiring harness and contacts
  2. Check the module supply voltage
  3. Update DCM software
  4. Replace DCM if necessary

Related codes

B2A0DB2A0EB2A0F

FAQ

What does the B2A0C code mean?

B2A0C is an OBD-II diagnostic trouble code that indicates: DCM Internal Fault

What causes a B2A0C error code?

The most common causes of B2A0C include: DCM software failure; Damage to internal module components; Module power problems; Short circuit in wiring harness.

How do I fix a B2A0C diagnostic trouble code?

To fix B2A0C: Check DCM wiring harness and contacts. Check the module supply voltage. Update DCM software. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2A0C?

Do not drive — repair immediately

How much does it cost to fix B2A0C?

The estimated repair cost for B2A0C is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat