Powertrain
generic / SAE
P24DB
Reductant Purge Control Valve B Circuit Open
The secondary reductant purge valve B - which clears AdBlue from injector and lines at shutdown to prevent crystallisation - has an open control circuit.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / DB
Possible causes
- Open in valve or wiring high
- Pin pushed back out of connector body low
- Cracked solder joint inside the module or sensor low
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)
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–500 €
- Estimated time: 0.6–2 h
- Component: reductant purge valve b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012