Reductant Injection Air Pressure Sensor A Circuit Intermittent

Where it lives

For P2041, the sensor sits on the circuit this code reports. The description of P2041 reports a fault at the sensor.

Check these first

• A loose reductant injection air pressure sensor A connector
• Intermittent chafing on the sensor A harness
• A failing sensor A that drops signal at times
• A dirty or unstable reductant injection air supply

What to do next

1. Read reductant injection air pressure sensor A 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 reductant injection air supply for contamination
5. Replace the reductant injection air pressure sensor A if the fault repeats
6. Clear the code and retest

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