P0817

What it means

The starter-disable circuit (used by transmission, immobiliser or anti-theft to block cranking unless safety conditions are met — e.g. clutch pedal pressed on manual, brake pedal on auto) is open. The starter cannot be disabled, weakening the safety chain.

Is it safe to drive?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

• Open disable wire

  high

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

• Pin pushed back out of connector body

  low

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

• Cracked solder joint inside the module or sensor

  low

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

Related help

• Full P0817 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?