Reductant Level Sensor A Circuit Intermittent/Erratic

Where it lives

For P203E, the circuit described runs through the sensor. The description of P203E reports a fault at the sensor.

Check these first

• A loose or corroded reductant level sensor A connector
• Intermittent chafing in the sensor A harness
• A failing reductant level sensor A that drops signal at times
• A poor sensor A ground that loses contact

What to do next

1. Read the reductant level sensor A value while wiggling the harness
2. Inspect the sensor A connector for loose or corroded pins
3. Test the sensor A circuit for intermittent opens
4. Check the sensor A ground for a voltage drop
5. Replace the reductant level sensor A if the fault repeats
6. Clear the code and retest

Look up another code