Reductant Pump A Current Too Low
The current draw of reductant pump A is below the calibrated minimum for the commanded duty. Indicates open winding, partial supply interruption, or pump no longer drawing fluid (dry running).
Affected components
- Reductant pump a
- Wiring harness
- Scr module
Common causes
- High likelihood: Pump motor winding partially open
- Medium likelihood: Pump dry running - no fluid load
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
- A drive cycle may be required after repair
- Reduced-power or limp mode may occur
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.