OBD Guide
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B2795

Unmatched Key Code

B2795 is an OBD-II diagnostic trouble code meaning: Unmatched Key Code. Common causes: faulty ignition key (damaged chip), damaged immobilizer antenna. Estimated repair cost: $56–333.

Severity
🚨 Critical
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • Engine won't start
  • The immobilizer indicator is flashing
  • The car stalls immediately after starting (in some cases)

Causes

  • Faulty ignition key (damaged chip)
  • Damaged immobilizer antenna
  • Key programming errors
  • Malfunction of the immobilizer control unit (ECU)
  • Problems with the immobilizer wiring harness

How to Fix

  1. Check the ignition key, try a spare key
  2. Diagnose the immobilizer antenna around the ignition switch
  3. Check the integrity of the immobilizer wiring harness
  4. Reprogram the key using dealer equipment
  5. In case of ECU malfunction, replace or reflash the control unit

Related codes

B2796B2797P0513

FAQ

What does the B2795 code mean?

B2795 is an OBD-II diagnostic trouble code that indicates: Unmatched Key Code

What causes a B2795 error code?

The most common causes of B2795 include: Faulty ignition key (damaged chip); Damaged immobilizer antenna; Key programming errors; Malfunction of the immobilizer control unit (ECU).

How do I fix a B2795 diagnostic trouble code?

To fix B2795: Check the ignition key, try a spare key. Diagnose the immobilizer antenna around the ignition switch. Check the integrity of the immobilizer wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2795?

Yes, but get it checked soon

How much does it cost to fix B2795?

The estimated repair cost for B2795 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat