Powertrain
generic / SAE
P2AB4
Cold Start Intake Manifold Runner Control Stuck Open Bank 2
During cold start, the intake manifold runner control on bank 2 cannot reach the closed position. Tumble/swirl effect for cold-start mixture preparation is reduced.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / B4
Possible causes
- Actuator sluggish at cold temperatures high
- Linkage iced or stiff medium
- Carbon or debris buildup preventing free movement low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1000 €
- Estimated time: 1–4 h
- Component: imrc actuator b2
- Component: intake manifold runners
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012