OBD Guide
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P1615

Difference of Key

P1615 is an OBD-II diagnostic trouble code meaning: Difference of Key. Common causes: using the wrong key, immobilizer malfunction. Estimated repair cost: $33–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Engine won't start
  • The immobilizer indicator is flashing
  • The car starts and immediately stalls
  • Fault message on the dashboard

Causes

  • Using the wrong key
  • Immobilizer malfunction
  • Problems with the chip in the key
  • Immobilizer antenna malfunction
  • Key programming error

How to Fix

  1. Try using a different registered key
  2. Check the condition of the battery in the key fob
  3. Immobilizer diagnostics by a specialist
  4. Reprogramming keys at an authorized dealer

Related codes

P1610P1611P1612

Error P1615 by Vehicle Brand

BuickCadillacChevroletGMGMCMercedes-BenzOldsmobileSaturnVolkswagen

FAQ

What does the P1615 code mean?

P1615 is an OBD-II diagnostic trouble code that indicates: Difference of Key

What causes a P1615 error code?

The most common causes of P1615 include: Using the wrong key; Immobilizer malfunction; Problems with the chip in the key; Immobilizer antenna malfunction.

How do I fix a P1615 diagnostic trouble code?

To fix P1615: Try using a different registered key. Check the condition of the battery in the key fob. Immobilizer diagnostics by a specialist. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1615?

Yes, but get it checked soon

How much does it cost to fix P1615?

The estimated repair cost for P1615 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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