OBD Guide
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B2799

Engine Immobiliser System Malfunction

B2799 is an OBD-II diagnostic trouble code meaning: Engine Immobiliser System Malfunction. Common causes: faulty ignition key, damaged immobilizer antenna. Estimated repair cost: $56–167.

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

Symptoms

  • Engine won't start
  • The immobilizer indicator is flashing
  • Engine stalls after starting

Causes

  • Faulty ignition key
  • Damaged immobilizer antenna
  • Open or short circuit in wiring harness
  • Engine control unit (ECU) malfunction
  • Immobilizer software problems

How to Fix

  1. Check the ignition key for damage
  2. Check the immobilizer antenna for integrity
  3. Check the wiring harness for breaks and short circuits
  4. Read error codes using diagnostic equipment
  5. If necessary, reprogram the immobilizer or replace the control unit

Related codes

B2798B2800P0513

FAQ

What does the B2799 code mean?

B2799 is an OBD-II diagnostic trouble code that indicates: Engine Immobiliser System Malfunction

What causes a B2799 error code?

The most common causes of B2799 include: Faulty ignition key; Damaged immobilizer antenna; Open or short circuit in wiring harness; Engine control unit (ECU) malfunction.

How do I fix a B2799 diagnostic trouble code?

To fix B2799: Check the ignition key for damage. Check the immobilizer antenna for integrity. Check the wiring harness for breaks and short circuits. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2799?

Yes, but get it checked soon

How much does it cost to fix B2799?

The estimated repair cost for B2799 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat