Reductant circuit
â–¶ How to fix
Check whether the reductant in the reductant circuit has frozen.Run EEC > E67 > EEC3 > Exhaust gas aftertreatment, troubleshooting > Troubleshooting guide.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The reductant pump needs to run more slowly than expected to maintain the correct reductant pressure.
Possible cause
Possible causes: Blockage in reductant tank return hose. Blockage in the reductant doser return pipe. Reductant pressure sensor in reductant doser indicates values that are too high. The reductant is frozen. The reductant freezes at -11°C.