OBD Guide
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B2794

Unmatched Encryption Code

B2794 is an OBD-II diagnostic trouble code meaning: Unmatched Encryption Code. Estimated repair cost: $56–167.

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

Symptoms

  • The car won't start
  • The immobilizer indicator is on
  • The engine stalls immediately after starting

How to Fix

  1. Check the condition of the ignition key
  2. Read trouble codes using an OBD-II scanner
  3. Check the integrity of the security system wiring harness
  4. Reprogram the ignition key
  5. Update ECU software
  6. If necessary, replace the immobilizer module

Related codes

B2795B2796P0510

FAQ

What does the B2794 code mean?

B2794 is an OBD-II diagnostic trouble code that indicates: Unmatched Encryption Code

How do I fix a B2794 diagnostic trouble code?

To fix B2794: Check the condition of the ignition key. Read trouble codes using an OBD-II scanner. Check the integrity of the security system wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2794?

Yes, but get it checked soon

How much does it cost to fix B2794?

The estimated repair cost for B2794 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat