P2041 moderate

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.

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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

Step-by-Step Diagnostic Procedure

  1. Confirm P2041 and review freeze frame data for intermittent conditions

  2. Wiggle-test sensor connector and wiring while monitoring signal

  3. Inspect connector pin tension and cleanliness

  4. Check wiring routing for chafing against moving parts

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.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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