Intake Manifold Runner Control Stuck Open Bank 2
The P2005 code indicates that the powertrain control module (PCM) has detected that the intake manifold runner control (IMRC) valve for bank 2 is stuck in the open position. The IMRC system uses flaps or valves inside the intake manifold to optimize airflow at different engine speeds. When stuck open, the engine loses low-end torque and may experience reduced fuel efficiency. This is common on engines with variable intake systems, often caused by carbon buildup, a faulty actuator, or a broken linkage.
01. Most Common Causes
- Carbon buildup on the IMRC flaps preventing movement
- Faulty IMRC actuator or motor
- Broken or disconnected linkage/rod
- Wiring or connector issues to the IMRC actuator
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power, especially at low RPM
- Poor fuel economy
- Rough idle or hesitation during acceleration
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P2005 is present. Check for additional codes like P2004 (stuck closed) or P2006 (stuck closed bank 2).
Step 2: Visually inspect the IMRC actuator and linkage on bank 2 for damage, disconnection, or carbon buildup. Manually move the linkage to check for binding.
Step 3: Use a scan tool to command the IMRC actuator open/closed while monitoring the actual position. If no movement, test the actuator's power and ground circuits.
Step 4: If the actuator is electrically functional but mechanically stuck, clean the intake manifold runners and flaps to remove carbon deposits. Replace the actuator if faulty.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe for short distances, but you may notice reduced performance and fuel economy. Prolonged driving can cause further carbon buildup or damage to the IMRC system.
How much does it cost to fix?▼
The cost ranges from $150 to $400 depending on the cause. Cleaning the intake manifold may cost $150-$250, while replacing the actuator or linkage can be $200-$400 including labor.