This code indicates that the engine computer has detected the intake manifold runner control valve for bank 2 is stuck in the open position. The intake manifold runner control adjusts the length and path of the intake airflow to optimize engine performance and efficiency at different RPMs. When stuck open, the engine cannot properly regulate airflow, leading to drivability and efficiency issues.
The actuator that moves the runner flaps, or the solenoid controlling the vacuum, can fail mechanically or electrically, leaving the valve stuck open.
A disconnected, cracked, or leaking vacuum line to the IMRC actuator prevents it from receiving the necessary vacuum pressure to close the runner flaps.
Carbon accumulation or physical debris around the intake manifold runner flaps or linkage can cause them to bind and stick in the open position.
Corroded, frayed, or disconnected wiring and connectors to the IMRC solenoid can prevent the valve from receiving the command to close.
In rare cases, a faulty PCM may fail to command the IMRC system, though this is an uncommon cause.
You can drive it, but it is not recommended for long periods. The engine may run roughly, lack power, and consume more fuel than normal.
Bank 2 refers to the side of the engine that does not contain cylinder number 1. On V-type engines, it is one specific side, while on inline engines there is only one bank.
Almost never. While some sources might suggest replacing the PCM, the actual cause is almost always a mechanical failure, vacuum leak, or carbon buildup in the intake manifold runner system.
The intake manifold often needs to be removed to manually clean the runner flaps and linkages of carbon buildup. Chemical intake cleaners may help with minor deposits but usually cannot resolve severe binding.