P2054 serious

Reductant Injector Circuit Intermittent (Bank 1 Unit 2)

The P2054 code means the vehicle's onboard diagnostic system has detected: Reductant Injector Circuit Intermittent (Bank 1 Unit 2). This is a serious severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$300 - $900 (parts and labor)
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Common Symptoms

  • Check Engine Light on intermittently
  • DEF warning light flickers
  • Erratic SCR system performance
  • Occasional power reduction
  • Speed limiter warning may appear intermittently

Probable Causes (Ranked by Likelihood)

  • Loose Unit 2 DEF injector connector Very High
  • Vibration-induced wiring break High
  • Failing injector with intermittent coil fault Moderate
  • Corroded connector pins Moderate
  • PCM output intermittent fault Low

Step-by-Step Diagnostic Procedure

  1. Confirm P2054 and review freeze frame data for intermittent patterns

  2. Wiggle-test Unit 2 injector connector while monitoring circuit

  3. Inspect wiring for vibration damage or heat deterioration

  4. Check connector pins for corrosion and proper tension

Frequently Asked Questions

What does P2054 mean?

P2054 indicates an intermittent electrical fault in the Bank 1 Unit 2 DEF injector circuit, causing unreliable DEF injection.

Can I drive with a P2054 code?

Short-distance driving is possible, but the intermittent fault compromises SCR system reliability.

How much does it cost to fix P2054?

Expect $300 to $900 for connector repair, wiring work, or injector replacement.

Sources

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

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