Intake Manifold Runner Control Stuck Closed
2009-2012 Ford Flex 3.5L V6
Description
The Intake Manifold Runner Control (IMRC) is stuck in the closed position. The IMRC system varies the intake manifold runner length or opening to optimize airflow at different RPMs.
Symptoms
- Check Engine Light
- Reduced high-RPM power
- Poor acceleration above 3000 RPM
- Engine feels sluggish at high speed
Common Causes
- Stuck IMRC actuator
- Broken IMRC linkage
- Carbon buildup on IMRC plates
- Faulty IMRC solenoid
- Vacuum hose leak to IMRC actuator
Diagnostic Steps
- Inspect IMRC actuator for free movement
- Check IMRC linkage for breakage
- Inspect vacuum supply to IMRC actuator
- Clean IMRC plates if carboned up
- Test IMRC solenoid
Repair Notes
Free or replace stuck IMRC actuator. Repair broken linkage. Clean carbon from plates.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1518 on Other Vehicles
Common Questions
What does code P1518 mean on a 2009-2012 Ford Flex?
P1518 stands for "Intake Manifold Runner Control Stuck Closed". The Intake Manifold Runner Control (IMRC) is stuck in the closed position. The IMRC system varies the intake manifold runner length or opening to optimize airflow at different RPMs.
What are the symptoms of P1518 on a Ford Flex?
Common symptoms of P1518 include: Check Engine Light, Reduced high-RPM power, Poor acceleration above 3000 RPM, Engine feels sluggish at high speed.
What causes P1518 on a 2009-2012 Ford Flex?
Common causes of P1518 include: Stuck IMRC actuator, Broken IMRC linkage, Carbon buildup on IMRC plates, Faulty IMRC solenoid, Vacuum hose leak to IMRC actuator.