P2AB5 — Cold Start Intake Manifold Runner Control Stuck Closed Bank 1
During cold start, the intake manifold runner control on bank 1 cannot reach the open position. Air supply may be restricted as the engine warms up.
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 b1
- 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.