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Home/DTC Codes/Ford/Explorer/2002-2005 4.6L V8/P1518
P1518

Intake Manifold Runner Control Stuck Closed

2002-2005 Ford Explorer 4.6L V8 🇨🇦

Moderate SeverityPowertrain

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

  1. Inspect IMRC actuator for free movement
  2. Check IMRC linkage for breakage
  3. Inspect vacuum supply to IMRC actuator
  4. Clean IMRC plates if carboned up
  5. Test IMRC solenoid

Repair Notes

Free or replace stuck IMRC actuator. Repair broken linkage. Clean carbon from plates.

Related Codes

P1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1516Throttle Actuator Control Position PerformanceP1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1516Throttle Actuator Control Module Throttle Actuator Position PerformanceP1519Idle Air Control Valve Circuit FailureP1519Idle Control Valve Position CircuitP1519Idle Control Valve Position CircuitP1519Idle Air Control Valve Circuit FailureP1520Cruise Control Switch Circuit MalfunctionP1520Camshaft Position Actuator Bank 1 TightP1520Stop Lamp Switch Signal MalfunctionP1520Stop Lamp Switch Signal MalfunctionP1520Camshaft Position Actuator Bank 1 TightP1520Stop Lamp Switch Signal Malfunction

Other Powertrain Codes

P1518 on Other Vehicles

Ford Aerostar

1990-1997 3.0L V6

Ford Aerostar

1990-1997 4.0L V6

Ford Bronco

1990-1996 4.9L I6 300

Ford Bronco

1990-1996 5.0L V8 302 Windsor

Ford Bronco

1990-1996 5.8L V8 351 Windsor

Ford Bronco

2021-2024 2.3L I4 EcoBoost

Ford Bronco

2021-2024 2.7L V6 EcoBoost

Ford Bronco Raptor

2022-2024 3.0L V6 EcoBoost

Common Questions

What does code P1518 mean on a 2002-2005 Ford Explorer?

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 Explorer?

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 2002-2005 Ford Explorer?

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.

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