P0498

What it means

The vent valve closes the EVAP canister to atmosphere during leak tests. The control line for that valve is shorted to ground - the ECU drives the valve and measures voltage below the expected level, indicating either a harness short or an internal solenoid short.

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

• Control line shorted to ground

  high

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

• Vent solenoid internally shorted

  medium

  A plausible cause — test and verify before replacing parts.

• Connector pins corroded - high contact resistance

  low

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

Related help

• Full P0498 diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?