P2004, P2005, P2006, P2007, P2008 Intake manifold runner: control is stuck open/closed, Bank A, Bank B

Land Rover OBD-II Trouble Codes -------------------------------------------------The diagnostic trouble codes (DTCs) P2004, P2005, P2006, P2007, and P2008 all relate to issues with the Intake Manifold Runner Control (IMRC) system. These codes specifically indicate that the control for the intake manifold runner is either stuck open or closed. Additionally, these codes may specify whether the issue is on Bank A or Bank B, depending on the engine configuration.

Here's a breakdown of each code:

1. **P2004 - Intake Manifold Runner Control Stuck Open (Bank 1):**

   - This code indicates that the IMRC system on Bank A (cylinder bank 1) has detected that the intake manifold runner control is stuck in the open position.

2. **P2005 - Intake Manifold Runner Control Stuck Open (Bank 2):**

   - Similar to P2004, this code indicates that the IMRC system on Bank B (cylinder bank 2) has detected that the intake manifold runner control is stuck in the open position.

3. **P2006 - Intake Manifold Runner Control Stuck Closed (Bank 1):**

   - This code indicates that the IMRC system on Bank A has detected that the intake manifold runner control is stuck in the closed position.

4. **P2007 - Intake Manifold Runner Control Stuck Closed (Bank 2):**

   - Similar to P2006, this code indicates that the IMRC system on Bank B has detected that the intake manifold runner control is stuck in the closed position.

5. **P2008 - Intake Manifold Runner Control Circuit/Open (Bank 1):**

   - This code indicates a circuit or electrical issue related to the IMRC system on Bank A.

### Possible Causes:

1. **Stuck IMRC Valve:** The intake manifold runner control valve may be physically stuck in either the open or closed position.

2. **IMRC Solenoid Issues:** The solenoid responsible for controlling the IMRC valve may be faulty.

3. **Wiring or Connector Issues:** Problems with the wiring or connectors associated with the IMRC system.

4. **Vacuum Leaks:** Leaks in the intake manifold or vacuum hoses can affect the operation of the IMRC system.

5. **Faulty IMRC Actuator:** The actuator that moves the IMRC valve may be malfunctioning.

6. **Carbon Buildup:** Accumulation of carbon deposits on the IMRC valve or related components.

7. **Faulty Intake Manifold Runner Control Module:** Issues with the control module responsible for managing the IMRC system.

### Diagnostic Steps:

1. **Inspect IMRC Valve and Actuator:** Check the physical condition of the IMRC valve and actuator for any signs of sticking, binding, or damage.

2. **Test IMRC Solenoid:** Test the IMRC solenoid for proper operation. Replace if necessary.

3. **Check Wiring and Connectors:** Inspect the wiring and connectors associated with the IMRC system. Look for any signs of damage, corrosion, or loose connections.

4. **Verify Vacuum Levels:** Check for vacuum leaks in the intake manifold and vacuum hoses. Address any identified leaks.

5. **Perform Carbon Cleanup:** If carbon buildup is suspected, consider cleaning the IMRC valve and related components.

6. **Test IMRC Module:** Test the IMRC control module for proper operation. Replace if necessary.

7. **Clear Codes:** After addressing any identified issues, clear the trouble codes and monitor the system for recurrence.

8. **Consider Professional Assistance:** If you are unsure about diagnosing or addressing these issues yourself, or if the faults persist, it's advisable to consult with a qualified mechanic or technician.

Addressing the root cause of the IMRC system faults is crucial for proper engine performance and emissions control. If in doubt or if the faults persist, seeking professional assistance is recommended for a thorough diagnosis and effective repair.