OBD-II code · Powertrain (generic, extended)
P2041 Reductant Injection Air Pressure Sensor A Circuit Intermittent
The reductant injection air-pressure sensor A signal jumps or drops out intermittently — connector or harness issue.
Is it safe to drive with P2041?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent connector or chafed wire
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Air Pressure Sensor, Reductant Air Pressure Connector
Related codes
- P2037Reductant Injection Air Pressure Sensor A Circuit
- P203EReductant Level Sensor A Circuit Intermittent/Erratic
- P203FReductant Level Too Low
- P2040Reductant Injection Air Pressure Sensor A Circuit High
- P2042Reductant Temperature Sensor A Circuit
- P2043Reductant Temperature Sensor A Circuit Range/Performance
- P2044Reductant Temperature Sensor A Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.