OBD Guide
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P1677

Immobilizer Function Deactivated

P1677 is an OBD-II diagnostic trouble code meaning: Immobilizer Function Deactivated. Common causes: malfunction of the key or its chip, problems with the immobilizer antenna. Estimated repair cost: $17–111.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–111 (est.)

Symptoms

  • Engine won't start
  • The immobilizer indicator is on
  • The car goes into emergency mode
  • Lost connection with the key

Causes

  • Malfunction of the key or its chip
  • Problems with the immobilizer antenna
  • Broken or shorted wiring
  • Failure in the immobilizer control unit
  • Incorrect system programming

How to Fix

  1. Check the condition of the key and its chip
  2. Diagnose the immobilizer antenna
  3. Check wiring integrity
  4. Read errors in the control unit
  5. Reprogram the immobilizer system
  6. Repair only from an authorized dealer

Related codes

P1675P1676P1678

Error P1677 by Vehicle Brand

AcuraBuickCadillacChevroletGMGMCHondaInfinitiOldsmobileSaturnVolkswagen

FAQ

What does the P1677 code mean?

P1677 is an OBD-II diagnostic trouble code that indicates: Immobilizer Function Deactivated

What causes a P1677 error code?

The most common causes of P1677 include: Malfunction of the key or its chip; Problems with the immobilizer antenna; Broken or shorted wiring; Failure in the immobilizer control unit.

How do I fix a P1677 diagnostic trouble code?

To fix P1677: Check the condition of the key and its chip. Diagnose the immobilizer antenna. Check wiring integrity. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1677?

Do not drive — repair immediately

How much does it cost to fix P1677?

The estimated repair cost for P1677 is $17–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat