check engine light on in 03 ranger (4 cyl)?

Question

around 36,000 miles the check engine light came on. i ignored it simply because that was when the warranty was up, and i thought it was cheap trick programmed in the computer by the dealer to get me to upgrade my warranty. i checked it anyway and the diag test read the code: p2004 bank 2 intake manifold runner stuck open. what i understand about intake manifold runners is that they are exclusive to performance vehicles. has anyone ever hear of an intake manifold runner? 10,000 miles later my truck runs fine and there are no noticable problems, just that glaring orange check engine light on the dash. do i or don't i have a problem?

Answer 1

On a 4cyl you won't have a "bank 2". Your IMRC is the problem, and yes you do have one. Here is some info;

The Intake Manifold Runner Control (IMRC) Electric Actuated system consists of a remote mounted motorized actuator with an attaching cable for each housing on each bank. Some applications will use one cable for both banks. The cable or linkage attaches to the housing butterfly plate levers. The 2.0L (2V) Focus/Escort IMRC uses a motorized actuator mounted directly to a single housing without the use of a cable. Each IMRC housing is an aluminum casting with two intake air passages for each cylinder. One passage is always open and the other is opened and closed with a butterfly valve plate. The housing uses a return spring to hold the butterfly valve plates closed. The motorized actuator houses an internal switch or switches, depending on the application, to provide feedback to the PCM indicating cable and butterfly valve plate position.

Below approximately 3000 rpm , the motorized actuator will not be energized. This will allow the cable to fully extend and the butterfly valve plates to remain closed. Above approximately 3000 rpm , the motorized actuator will be energized. The attaching cable will pull the butterfly valve plates into the open position. Some vehicles will activate the IMRC near 1500 rpm .

WARNING: SUBSTANTIAL OPENING AND CLOSING TORQUE IS APPLIED BY THIS SYSTEM. TO PREVENT INJURY, BE CAREFUL TO KEEP FINGERS AWAY FROM LEVER MECHANISMS WHEN ACTUATED.



The PCM uses the Throttle Position (TP) sensor and Crankshaft Position (CKP) signals to determine activation of the IMRC system. There must be a positive change in voltage from the TP sensor along with the increase in rpm to open the valve plates.
The PCM uses the information from the input signals to control the IMRC motorized actuator based upon rpm and changes in throttle position.
The PCM energizes the actuator to pull the butterfly plates open with the cable(s) or linkage.
The IMRC housing contains butterfly plates to allow increased air flow.

Answer 2

I would say take it in anyways and if there isn't a problem at least have the code cleared so the light will go away. Maybe since then there has been another underlying problem and you don't know it because the light has always been on.

Answer 3

The light doesn't come on unless your car has a problem. It may run fine, but things are going on that could cause other problems.
Such as damaging the catalytic converter.
I'd have it checked out before you have real problems.
Master tech 40 yrs.