U0326

What it means

A module reports a software version mismatch with the vehicle immobilizer control module — typically after replacing one of the modules without programming the new unit to match the rest of the network. The engine may refuse to start.

Is it safe to drive?

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.

Most likely causes

• Module replaced without programming

  high

  One of the most commonly reported causes for this code — check this first.

• Wrong part number for the vehicle

  medium

  A plausible cause — test and verify before replacing parts.

• Gateway module routing CAN messages incorrectly

  low

  Less common, but worth ruling out after the more likely causes.

Related help

• Full U0326 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?