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.
Affected components
- Imrc actuator b2
- Intake manifold runners
Common causes
- High likelihood: Actuator sluggish at cold temperatures
- Medium likelihood: Linkage iced or stiff
- Low likelihood: 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
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.