Fix P2007: Mechanic’s solutions that WORKED

The P2007 code is a diagnostic trouble code (DTC) that signifies an issue with the Intake Manifold Runner Control (IMRC) on Bank 2 of the engine. This control system helps optimize engine performance by adjusting the airflow within the intake manifold, enhancing fuel efficiency and power output. When the IMRC is stuck closed, it means the system cannot adjust the airflow as needed, potentially leading to reduced engine performance, increased emissions, or even engine stalling.

P2007 quick overview

Meaning	P2007 – Intake Manifold Runner Control Stuck Closed Bank 2
Is it serious?	Yes, this can affect engine performance and fuel efficiency.
Possible causes	– Faulty IMRC actuator or solenoid – Vacuum leaks affecting the IMRC system – Obstructed or damaged intake runners – Electrical issues, such as damaged wiring or poor connections
How to diagnose?	Inspect the IMRC for proper operation and physical condition. Check vacuum lines and connections for leaks or damage. Examine electrical wiring and connectors for signs of wear or damage. Verify vacuum supply to the IMRC actuators, especially on vehicles with vacuum-operated systems. Look for Technical Service Bulletins (TSBs) that might address known issues with the IMRC system. Test the actuator and position sensors to ensure they operate within specifications.

How to fix P2007 – learn from mechanics

I looked into P2007 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.

Case #1: Audi

Vehicle Information 2015 Audi Q7 Premium Plus 3.0L

Issue + Repair History

• Vacuum activated both control solenoid/position sensors.
• Sensors rotate and show voltage change at idle, but both show adaptation error.
• Actual and specified position are the same.
• Vacuum supply to the runners repaired to resolve the issue.

Other OBD2 Codes + Test Results

• P2004: IMRC B1 stuck open
• P2005: IMRC B2 stuck open
• P2006: IMRC B1 stuck closed
• P2007: IMRC B2 stuck closed

Mechanic Suggestions

• Check for a TSB related to the codes; updated vacuum hoses might be available.
• TSB indicates vacuum-controlled water pump drawing excessive vacuum, causing intake flaps malfunction. Fix is a new vacuum hose with a restriction.
• If the intake manifold/supercharger has been removed recently, check if the fuel rail was installed without holding the flaps in the correct position.
• Verify vacuum to the solenoids on the back of the supercharger while the vehicle is idling. Low or no vacuum indicates a problem on the vacuum pump side.
• Disconnect the middle top vacuum hose for the intake runners and pump them up with a hand pump to check for leaks in the vacuum line under the supercharger.
• Check for a vacuum switchable coolant pump; the vacuum feed comes off the solenoid on the left side of the engine block under the vacuum pump. If deleted, verify the vacuum lines are capped.
• Check the TSB for vacuum hose replacement.

Final Fix Repaired the vacuum supply to the runners, resolving the adaptation error and poor fuel economy issue.

Case #2: Subaru

Vehicle Information 2005 Subaru Outback XT 2.5L

Issue + Repair History

• Car came into the shop with a rod knock.
• Engine removed and replaced for repairs.
• After repairs, the car failed to build boost with a new turbo.
• Front catalytic converter found to be plugged and replaced.
• Tested the back catalytic converter; appeared to be okay.
• Code P2007 for bank 2 intake runner stuck closed.
• Throttle valve assembly found to be stuck closed; replaced with a new valve, resolving the issue.

Other OBD2 Codes + Test Results

• P2007: IMRC B2 stuck closed

Mechanic Suggestions

• Investigate why the intake runner valve is stuck closed; inspect the intake manifold.
• Verify that vacuum lines are routed correctly and not damaged.
• Check vacuum lines for the wastegate solenoid; ensure proper routing and integrity of the lines.
• If vacuum lines were replaced, ensure they contain special restrictors inside.
• If the intake manifold or supercharger was removed, ensure that the flaps were installed correctly and held in the correct position.
• Test the wastegate solenoid to ensure it is not stuck open.
• Inspect the turbo for any defects, such as a cracked wastegate seat or a detached butterfly.
• Verify that the TGV is not sticking and that the wastegate shaft bushing has not backed out.

Final Fix Replaced the throttle valve assembly, resolving the issue of the stuck closed intake runner and restoring proper boost function.

Case #3: Ford

Vehicle Information 2009 Ford F-150 XLT 4.6L

Issue + Repair History

• Vehicle experienced intermittent no-start and stall conditions, particularly after refueling.
• MIL would appear intermittently, sometimes not illuminating during morning starts.
• Codes P2006 (Intake Manifold Runner Stuck Closed B1) and P2007 (Intake Manifold Runner Stuck Closed B2) were pulled.
• Fuel pressure checked at 55psi, dropping immediately after shut off.
• Previous repair history included replacing both O2 sensors due to circuit faults.
• Canister purge solenoid suspected to be the cause of the issue.

Other OBD2 Codes + Test Results

• P2006: Intake Manifold Runner Stuck Closed B1
• P2007: Intake Manifold Runner Stuck Closed B2
• Fuel pressure: 55psi (spec 55psi)

Mechanic Suggestions

• Inspect the canister purge valve for proper operation; service bulletin 11-10-3 may be relevant.
• Investigate whether the purge valve is stuck open, causing the canister to fill with gas vapors.
• Check fuel trims and throttle sensor stability.
• Consider the possibility of leaking injectors causing flooding after refueling.
• Verify the integrity of the fuel delivery module; check for any open campaigns for flash reprogramming.
• Examine the check valve in the fuel pump to ensure it is not stuck open.

Final Fix Replaced the canister purge solenoid with a Motorcraft unit, resolving the no-start and stall conditions. Vehicle returned for an oil change 6,000 miles later with no further issues.

Diagnostic Step	Explanation
Inspect the IMRC and actuator	Check for physical obstructions or failures that prevent the IMRC from operating.
Check vacuum lines and connections	Ensure there are no leaks or damage that could affect the IMRC system’s functionality.
Examine electrical wiring and connectors	Look for any signs of damage or wear that could impair signal transmission.
Verify vacuum supply	Make sure the IMRC actuators are receiving the correct vacuum level, particularly in vacuum-operated systems.
Consult TSBs for known issues	Some vehicles may have updated parts or procedures to address common IMRC problems.
Test actuator and position sensors	Confirm that these components are functioning within their specified ranges and respond correctly to input signals.

In the cases provided, addressing the P2007 code involved a mix of repairs from replacing vacuum lines and actuators to addressing electrical issues and even changing out the canister purge solenoid. These steps highlight the importance of a comprehensive diagnostic approach to accurately identify and resolve issues related to the IMRC system.