OBD Guide
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B278D

Malfunction of ID-BOX Recognition

B278D is an OBD-II diagnostic trouble code meaning: Malfunction of ID-BOX Recognition. Common causes: id-box malfunction, wiring harness damage. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine light comes on
  • Problems starting the engine
  • The car may not respond to the ignition key

Causes

  • ID-BOX malfunction
  • Wiring harness damage
  • Problems with contacts in connectors
  • ECU malfunction

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect the ID-BOX and ECU connectors for oxidation or damage
  3. Check the functionality of ID-BOX using diagnostic equipment
  4. If necessary, replace ID-BOX or ECU

Related codes

B278EB278F

FAQ

What does the B278D code mean?

B278D is an OBD-II diagnostic trouble code that indicates: Malfunction of ID-BOX Recognition

What causes a B278D error code?

The most common causes of B278D include: ID-BOX malfunction; Wiring harness damage; Problems with contacts in connectors; ECU malfunction.

How do I fix a B278D diagnostic trouble code?

To fix B278D: Check the integrity of the wiring harness. Inspect the ID-BOX and ECU connectors for oxidation or damage. Check the functionality of ID-BOX using diagnostic equipment. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B278D?

Yes, but get it checked soon

How much does it cost to fix B278D?

The estimated repair cost for B278D is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat