P2005 on Subaru
Intake Manifold Runner Control Stuck Open (Bank 1)
P2005 on Subaru vehicles indicates intake manifold runner control stuck open (bank 1). Au7o has documented this code across 1 Subaru model — most commonly on WRX STI. This code means the engine computer detected that the intake manifold runner control (IMRC) for Bank 1 is stuck in the open position. The IMRC system uses flaps inside the intake manifold to change airflow length and velocity depending on engine speed, improving low-end torque and high-end power. When the runners are stuck open, the engine can't optimize airflow, which may cause rough low-speed running, reduced power, and a check engine light. It is not an immediate breakdown risk but should be addressed to restore performance and pass emissions. Typical repair costs on Subaru range from $250 to $1,400, depending on the specific model and root cause.
Common Causes of P2005
- •Carbon buildup jamming the runner flaps
- •Stuck or seized IMRC actuator
- •Broken or disconnected runner control linkage
- •Failed vacuum-operated runner actuator or leaking vacuum line
- •Faulty intake manifold runner position sensor
- •Wiring or connector fault to the IMRC solenoid
- •Damaged intake manifold runner assembly
P2005 on Subaru by Model
Subaru WRX STI(1 issue)
- Tumble Generator Valve (TGV) Sensor/Motor Fault (P2004/P2005/P2011/P2016)2004-2014
WRX STI models with EJ257 intake TGV assemblies can develop failures in the TGV position sensors or actuator mechanisms, leading to stuck-open/stuck-closed conditions. Owners report check engine lights, rough cold starts, and reduced drivability, especially in colder weather. This issue is frequently discussed in owner reports and appears in diagnostic guidance/TSBs for Subaru intake runner control/TGV-related DTCs.
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What does P2005 mean on Subaru?▼
P2005 stands for "Intake Manifold Runner Control Stuck Open (Bank 1)." This code means the engine computer detected that the intake manifold runner control (IMRC) for Bank 1 is stuck in the open position. The IMRC system uses flaps inside the intake manifold to change airflow length and velocity depending on engine speed, improving low-end torque and high-end power. When the runners are stuck open, the engine can't optimize airflow, which may cause rough low-speed running, reduced power, and a check engine light. It is not an immediate breakdown risk but should be addressed to restore performance and pass emissions. On Subaru specifically, this code is documented across 1 model.
What causes P2005 on Subaru vehicles?▼
Common causes on Subaru: Carbon buildup jamming the runner flaps, Stuck or seized IMRC actuator, Broken or disconnected runner control linkage, Failed vacuum-operated runner actuator or leaking vacuum line, Faulty intake manifold runner position sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2005 on a Subaru?▼
Repair costs on Subaru range from $250 to $1,400, depending on the specific model and root cause.
Which Subaru models have P2005 documented?▼
Au7o has documented P2005 on 1 Subaru model: WRX STI.