Reductant Injector Circuit Intermittent (Bank 1 Unit 1)
The P2050 code means the vehicle's onboard diagnostic system has detected: Reductant Injector Circuit Intermittent (Bank 1 Unit 1). This is a serious severity code.
- 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 may come and go
- Erratic DEF injection
- SCR efficiency fluctuating
- Possible speed limiter warning
Probable Causes (Ranked by Likelihood)
- Loose DEF injector connector Very High
- Intermittent wiring fault from vibration or heat High
- Failing DEF injector with intermittent coil Moderate
- Corroded connector pins Moderate
- PCM intermittent output fault Low
Step-by-Step Diagnostic Procedure
-
Confirm P2050 and review freeze frame data
-
Wiggle-test DEF injector connector while monitoring circuit
-
Inspect wiring for heat damage or chafing near exhaust
-
Check connector pin tension and condition
Frequently Asked Questions
What does P2050 mean?
P2050 indicates the DEF injector circuit has an intermittent electrical fault, causing unpredictable DEF spray patterns that compromise SCR efficiency.
Can I drive with a P2050 code?
Short-distance driving is possible, but the intermittent fault means the SCR system will not reliably reduce NOx emissions.
How much does it cost to fix P2050?
Expect $300 to $900, typically for connector repair, wiring work, or DEF injector replacement.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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