P203E

What it means

Reductant Level Sensor A Circuit Intermittent/Erratic: the signal is intermittent or erratic. Often a loose connector or chafed wiring; a wiggle test often locates it.

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

• Corroded sender contact

  high

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

• Connector with intermittent contact under vibration

  low

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

• Harness routed against vibrating component

  low

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

Related help

• Full P203E diagnosis, causes & costs
• How to read check engine light codes
• Is it safe to drive with the light on?