OBD Guide
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B2477

Module Configuration Failure

B2477 is an OBD-II diagnostic trouble code meaning: Module Configuration Failure. Common causes: incorrect srs module firmware, module replacement without reprogramming. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Restraint system disabled
  • The error does not disappear after a scanner reset

Causes

  • Incorrect SRS module firmware
  • Module replacement without reprogramming
  • Damage to the restraint system wiring harness
  • Corrosion or poor contact in connectors
  • SRS module power failure

How to Fix

  1. Diagnostics with a scanner to accurately identify the module with an error
  2. Checking the integrity of the wiring harness and contacts
  3. Flashing or reconfiguring the SRS module
  4. Replacing the module if necessary
  5. Resetting errors and checking system operation

Related codes

B2478B2482B0001

FAQ

What does the B2477 code mean?

B2477 is an OBD-II diagnostic trouble code that indicates: Module Configuration Failure

What causes a B2477 error code?

The most common causes of B2477 include: Incorrect SRS module firmware; Module replacement without reprogramming; Damage to the restraint system wiring harness; Corrosion or poor contact in connectors.

How do I fix a B2477 diagnostic trouble code?

To fix B2477: Diagnostics with a scanner to accurately identify the module with an error. Checking the integrity of the wiring harness and contacts. Flashing or reconfiguring the SRS module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2477?

Do not drive — repair immediately

How much does it cost to fix B2477?

The estimated repair cost for B2477 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat