P2005 Intake manifold runner control unit stuck open bank 2

OBD-II DTC Datasheet

Intake manifold guide control unit 2 is stuck open

What does this mean?

This Diagnostic Trouble Code (DTC) is a generic transmission code, which means it applies to all 1996 vehicles (Mazda, Ford, Dodge, Jeep, Kia, etc.). Although general, specific repair steps may differ depending on the brand / model.

A stored code P2005 in your OBD II equipped vehicle means the powertrain control module (PCM) has detected that the intake manifold travel control (IMRC) actuator for engine bank 2 is stuck open. Bank 2 means that the problem has occurred in the engine group that does not contain cylinder # 1.

The IMRC system is controlled by the PCM to control and fine tune the air flow to the lower intake manifold, cylinder heads and combustion chambers. The slider control solenoid valve opens / closes metal flaps that fit snugly against the inlet of each cylinder. The runners' dampers are bolted to a thin metal bar that runs the length of each cylinder head and through each intake port. All doors can be opened at the same time in one motion, but this also means that all doors can fail if one is stuck or stuck. The IMRC actuator is attached to the stem using a mechanical arm or gear. Some models use a vacuum diaphragm actuator. An electronic solenoid (PCM controlled) regulates the suction vacuum to the IMRC actuator in this type of system.

The swirl effect is created by directing and restricting the airflow as it is drawn into the engine. Studies show that the swirling effect contributes to a more complete atomization of the fuel-air mixture. More thorough atomization helps reduce exhaust emissions, improve fuel efficiency and optimize engine performance. Automakers use different IMRC methods. Consult your vehicle information source (All Data DIY is a good option) to find out about the IMRC system that this vehicle is equipped with. Theoretically, the IMRC runners partially close during start/idle and fully open when the throttle is opened.

To ensure that the IMRC actuator is working properly, the PCM monitors inputs from the IMRC impeller position sensor, manifold absolute pressure (MAP) sensor, manifold air temperature sensor, intake air temperature sensor, throttle position sensor, oxygen sensors, and mass air flow (MAF) sensor (among others).

As the controllability data is entered into the PCM and calculated, the PCM monitors the actual position of the impeller flap and adjusts it accordingly. If the PCM does not see a sufficiently large change in MAP or manifold air temperature to match the desired flap position (IMRC actuator), a P2005 code will be stored and the malfunction indicator lamp may illuminate. MIL often requires multiple ignition cycles with IMRC actuator failure to turn on.

symptoms

Symptoms of a P2005 code may include:

Decreased engine performance, especially at low revs.
Reduced fuel efficiency
Engine surge

reasons

Possible causes of this engine code include:

Faulty IMRC actuator solenoid bank 2
Loose or sticking intake manifold rails on row 2
Defective intake manifold impeller position sensor, bank 2
Open or short circuit in the solenoid control circuit of the IMRC actuator of block 2
Defective MAP sensor
Corroded surface of the IMRC actuator solenoid valve connector

Diagnostic and repair procedures

Trying to diagnose a P2005 code will require a diagnostic scanner, a digital volt / ohmmeter (DVOM), and a reliable vehicle information source such as All Data DIY.

Check technical service bulletins (TSBs) for specific symptoms, stored code / codes, and vehicle make and model before diagnosing. If there is a corresponding TSB, the information it contains can help you diagnose the P2005 in your vehicle.

I like to start diagnostics with a visual inspection of the system wiring and connector surfaces. It looks like the IMRC actuator connectors are susceptible to corrosion, which can cause an open circuit, so pay special attention to this.

Then I usually plug the scanner into the vehicle's diagnostic socket and retrieve all stored codes and freeze frame data. I prefer to record this information just in case it is intermittent code; I would then clear the codes and test drive the car to see if the code is cleared.

If cleared, access the IMRC actuator solenoid and IMRC impeller position sensor. Check with your vehicle's information source for guidance on testing these components. Using the DVOM, check the resistance of both components. If the actuator or position transmitter does not meet the manufacturer's recommendations, replace the defective part and retest the system.

If the drive resistance and sensor resistance are within manufacturer's specifications, use the DVOM to test the resistance and continuity of all circuits in the system. To avoid damaging the controller, disconnect all associated controllers before testing. Repair or replace open or closed circuits as necessary.

Additional diagnostic notes:

Check for jamming of the IMR damper with the drive disconnected from the shaft.
The screws (or rivets) that secure the flaps to the shaft can loosen or fall out, causing the flaps to seize.
Carbon coking inside the intake manifold walls can cause seizing.

Related DTC discussions

2005 SUBARU WRX 2.5 TURBO CODE P2005 INDUCTION MAN. RUN SHOT OPEN BANK2I JUST CHANGED CLUTCH FOR WRX W / TURBO, OAT ABOUT 10 MIN. INITIAL SCREW WRX TO TEST CODE P2005, INDUCTION MANIFOLD OPERATING CLOSED OPEN. I HAVE TO REMOVE THE EXHAUST BECAUSE I OPENED IT FROM THE TURBO BUT IT WAS CLOSE TO BANK 2 THAT I GOT WHAT I CAN DO TO MAKE A PC ...

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