Code result

P23C1

NOx Sensor Sensing Element Bank 1 Sensor 3

Moderate severity

What it means

NOx Sensor Sensing Element Bank 1 Sensor 3: the control module has detected this fault condition.

Is it safe to drive?

Use caution

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

  • Sensor element poisoned by silicone or sulphur

    high

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

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