OBD Guide
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B2900

ABS VIN Mismatch

B2900 is an OBD-II diagnostic trouble code meaning: ABS VIN Mismatch. Common causes: replacing the abs module without reprogramming, abs module software failure. Estimated repair cost: $56–167.

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

Symptoms

  • ABS light is on
  • Disabling the ABS system
  • Diagnostic error

Causes

  • Replacing the ABS module without reprogramming
  • ABS module software failure
  • Wiring harness damage
  • Contact corrosion

How to Fix

  1. Check VIN in ABS module using diagnostic scanner
  2. Reprogram ABS module if VIN does not match
  3. Check the integrity of the wiring harness and contacts
  4. Replace ABS module if necessary

Related codes

C1234U0121

FAQ

What does the B2900 code mean?

B2900 is an OBD-II diagnostic trouble code that indicates: ABS VIN Mismatch

What causes a B2900 error code?

The most common causes of B2900 include: Replacing the ABS module without reprogramming; ABS module software failure; Wiring harness damage; Contact corrosion.

How do I fix a B2900 diagnostic trouble code?

To fix B2900: Check VIN in ABS module using diagnostic scanner. Reprogram ABS module if VIN does not match. Check the integrity of the wiring harness and contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2900?

Limited driving only, diagnose soon

How much does it cost to fix B2900?

The estimated repair cost for B2900 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat