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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Imrc actuator b2
- Intake manifold runners
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Actuator sluggish at cold temperatures
- Linkage iced or stiff
- Carbon or debris buildup preventing free movement
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
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.