OBD Guide
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P1648

Anti-Theft Device Wrong Security Code

P1648 is an OBD-II diagnostic trouble code meaning: Anti-Theft Device Wrong Security Code. Common causes: faulty chip in the ignition key, problems with the immobilizer antenna. Estimated repair cost: $17–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–167 (est.)

Symptoms

  • Engine won't start
  • The immobilizer indicator is flashing
  • No fuel supply
  • No ignition spark
  • Fault message on the dashboard

Causes

  • Faulty chip in the ignition key
  • Problems with the immobilizer antenna
  • Malfunction of the immobilizer control unit
  • Dead battery in the key (for keyless entry)
  • Incorrect key programming

How to Fix

  1. Check the battery in the ignition key
  2. Use backup key
  3. Diagnostics of the immobilizer system with a scanner
  4. Reprogramming keys at an authorized dealer
  5. Repair or replacement of the immobilizer control unit

Related codes

P1610P1626P1630

Error P1648 by Vehicle Brand

JaguarVolkswagen

FAQ

What does the P1648 code mean?

P1648 is an OBD-II diagnostic trouble code that indicates: Anti-Theft Device Wrong Security Code

What causes a P1648 error code?

The most common causes of P1648 include: Faulty chip in the ignition key; Problems with the immobilizer antenna; Malfunction of the immobilizer control unit; Dead battery in the key (for keyless entry).

How do I fix a P1648 diagnostic trouble code?

To fix P1648: Check the battery in the ignition key. Use backup key. Diagnostics of the immobilizer system with a scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1648?

Yes, but get it checked soon

How much does it cost to fix P1648?

The estimated repair cost for P1648 is $17–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat