Code P2004

Hello,

The IMRC system is mounted to the intake manifold and air cleaner. Here is a complete guide on where the components are and how to change them. (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken

Yes, make sure the 2 lines are still connected to it.

Your vehicle only has one bank of cylinders. Just check wiring to imrc module, either one. Not sure why it would have two though. Should only have one.

That rustier one may be your problem. Try replacement.

15) For KOEO & Continuous Memory Only DTCs P1516, P1517, P2014 & P2019, & For KOEO, KOER & Continuous Memory DTCs P1518-P1520, P1537, P1538, P2004-P2006 & P2008: Visual InspectionDTCs P1516 (IMRC or IMSC input error bank No. 1) and P1517 (IMRC or IMSC input error bank No. 2) indicate KOEO or Continuous Memory self-test failed when IMRC or IMSC monitor circuit signal fell below or exceeded expected calibrated range. Possible cause is binding, seizing, damage or obstruction of IMRC or IMSC mechanical system.
DTCs P1518, P1537 and P1538 may indicate IMRC or IMSC Bank No. 1 or Bank No. 2 stuck open. KOEO or Continuous Memory self-test failed when IMRC or IMSC monitor circuit signal falls below expected calibrated range at closed throttle. Possible causes are:

IMRC Or IMSC SIG Circuit Shorted To PWR GND Or SIG RTN
Faulty IMRC Or IMSC Actuator
Faulty Powertrain Control Module (PCM)
DTC P1519 indicates IMRC or IMSC may be stuck closed. KOEO or Continuous Memory self-test failed when IMRC or IMSC monitor circuit signal exceeded expected calibrated range with IMRC or IMSC activated. Possible causes are:

Faulty Vacuum Hoses
Faulty Vacuum Solenoid
Faulty Vacuum Actuator
IMRC Or IMSC Actuator Cable, Lever Or Gears Binding Or Seized
Cables Improperly Routed, Binding Or Seized
Faulty IMRC Or IMSC Actuator
Damaged Or Disconnected IMRC Or IMSC Housing Return Springs
Lever Return Stop Obstructed Or Bent
Lever Wide Open Stop Obstructed Or Bent
IMRC Or IMSC Monitor Circuit Open Or Shorted To VREF
IMRC Or IMSC SIG RTN Circuit Open Or Shorted To VPWR Or GND
IMRC Or IMSC VPWR Circuit Open
On models equipped with cable operated IMRC or IMSC, check IMRC or IMSC cables for correct routing and possible binding. Ensure cable core wire (if equipped) has slack at IMRC or IMSC housing and that lever contacts close plate stop screw. Ensure return springs operate properly and plates open and close fully. On models with vacuum operated systems, engine must run for 20 seconds, then perform KOEO self-test. On all models, operate IMRC or IMSC plates at intake manifold while checking for binding and sticking. If any faults are found, go to next step. If no faults are found, go to step 17).

WARNING: Be careful when operating IMRC or IMSC by hand. IMRC or IMSC return springs are strong and may cause plates to close suddenly.

Basically 3 problems possible;
Bad IMRC
Bad PCM (at least reflash needed)
Binding mechanisms such as throttle cable or throttle plate

Perform IMRC Or IMSC Physical TestOn Focus 2.0L 2V, Econoline and Pickup 4.2L, and Ranger 2.3L, remove electronic actuator assembly. On all others, disconnect IMRC or IMSC linkage or cable(s) from intake runner(s). Rotate IMRC or IMSC lever(s) from fully closed to fully open, and back to fully closed positions while checking for binding or sticking. Feel for return spring tension of approximately 3-4 INCH. Lbs. (0.34-0.45 N.M). Levers should fully open and close without obstruction. If any faults are found, clean or repair as necessary. If no faults are found, replace IMRC or IMSC actuator.