Reductant Injection Air Pressure Sensor Circuit Intermittent
The P2041 code means the vehicle's onboard diagnostic system has detected: Reductant Injection Air Pressure Sensor Circuit Intermittent. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $600 (parts and labor)
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Common Symptoms
- Check Engine Light on intermittently
- DEF system warning may come and go
- Occasional power reduction
- SCR efficiency intermittently low
- CEL may clear and return
Probable Causes (Ranked by Likelihood)
- Loose air pressure sensor connector Very High
- Intermittent wiring fault from vibration High
- Failing air pressure sensor Moderate
- Corroded connector pins making poor contact Moderate
- PCM intermittent input fault Low
Frequently Asked Questions
What does P2041 mean?
P2041 indicates the reductant injection air pressure sensor signal is intermittent, typically from a loose connector or wiring fault that causes the signal to drop in and out.
Can I drive with a P2041 code?
Short-distance driving is acceptable, but the intermittent fault may cause the DEF system to function erratically.
How much does it cost to fix P2041?
Repairs typically cost $200 to $600, often involving connector repair or wiring harness replacement.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Confirm P2041 and review freeze frame data for intermittent conditions
-
Wiggle-test sensor connector and wiring while monitoring signal
-
Inspect connector pin tension and cleanliness
-
Check wiring routing for chafing against moving parts
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2012-2018 BMW 328d 2.0L Diesel
- 2010-2016 Mercedes-Benz ML350 3.0L BlueTEC
- 2014-2020 Ram 3500 6.7L Cummins
- 2011-2017 Ford F-350 6.7L Power Stroke
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