Intake Manifold Runner Control Circuit High (Bank 1)
Common Symptoms
- Check Engine Light illuminated
- Reduced engine power or hesitation during acceleration
- Poor fuel economy
- Rough idle or unstable engine operation
- Decreased throttle response
Most Likely Root Causes
- Faulty intake manifold runner control solenoid or actuator
- Damaged or corroded wiring harness to IMRC valve
- Failed IMRC valve position sensor
- Stuck or binding intake manifold runner flaps
- PCM internal fault
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Component Location
The intake manifold runner control valve is mounted on the intake manifold, typically on the side or top accessible from the engine bay.
Manufacturer Notes
Ford and Mazda vehicles commonly experience this code due to carbon buildup causing runner flap binding in the intake manifold.
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