Reductant Injection Valve Circuit/Open (Bank 1 Unit 1)
Reductant Injection Valve Circuit/Open (Bank 1 Unit 1): the circuit is open. This valve doses reductant (DEF/AdBlue) into the exhaust for SCR NOx reduction.
Affected components
- Reductant injection valve
- Reductant injection harness
Common causes
- High likelihood: Solenoid winding open
- Medium likelihood: Open wire between PCM and valve
- Medium likelihood: Connector corroded
Possible symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.