P2058 serious

Reductant Injector Circuit Intermittent (Bank 2 Unit 1)

The P2058 code means the vehicle's onboard diagnostic system has detected: Reductant Injector Circuit Intermittent (Bank 2 Unit 1). 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 system warning fluctuates
  • Erratic Bank 2 DEF injection
  • SCR efficiency inconsistent
  • Speed limiter warning may appear

Probable Causes (Ranked by Likelihood)

  • Loose Bank 2 DEF injector connector Very High
  • Intermittent wiring fault from vibration High
  • Failing injector with intermittent coil Moderate
  • Corroded or contaminated connector pins Moderate
  • PCM intermittent output fault Low

Step-by-Step Diagnostic Procedure

  1. Confirm P2058 and check freeze frame data for patterns

  2. Wiggle-test Bank 2 injector connector while monitoring

  3. Inspect wiring for chafing or heat damage near exhaust

  4. Check connector pins for proper contact and corrosion

Frequently Asked Questions

What does P2058 mean?

P2058 indicates an intermittent fault in the Bank 2 Unit 1 DEF injector circuit, causing unreliable DEF injection on that bank.

Can I drive with a P2058 code?

Short-distance driving is possible, but the intermittent fault means Bank 2 SCR operation is unreliable.

How much does it cost to fix P2058?

Expect $300 to $900, typically 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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