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P2004 - Intake Manifold Runner Control (IMRC) Stuck Open (Bank 1)

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P2004 - INTAKE MANIFOLD RUNNER CONTROL (IMRC) STUCK OPEN (BANK 1)

Description:  This DTC is set when the IMRC is commanded closed, but the IMRC monitor indicates open. This DTC replaces P1518 and P1537.
Possible Causes: 
  • IMRC monitor signal circuit shorted to PWR GND or SIG RTN
  • Damaged IMRC actuator or solenoid
  • Blocked vacuum hoses
Diagnostic Aids:  Monitor the IMRC and IMRCM PIDs. The IMRCM state should change when the IMRC is commanded open or closed.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All refer to PINPOINT TEST HU .
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