P2009Intake Manifold Runner Control Circuit Low (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2009 narrows the bank 1 flap control fault down to a low signal, which in practice means the control line has found a path to ground. GM's 2018 diesel tables flag a resistance to ground below 0.5 Ω in 12 of 15 checks every 100 ms (Type B), and the 2014 Cruze diesel waits until the short has lasted more than 3 s. In GM's 2025 DC-motor swirl drive the H-bridge is switched on and the code sets when its current exceeds 8 A in 240 of 300 samples. On the 2010 Saab 9-5 diesel the ECM uses P2009 for a grounded control circuit of the swirl solenoid. Subaru lists P2009, together with P2012 for bank 2, among codes on 2017–2020 Impreza and Crosstrek where grease from the tumble valve actuator leaks into the engine; the actuator is not sold alone, so the manifold is replaced. A chafed harness or water in the plug are the usual causes.
- What you may notice
- Malfunction indicator lamp on
- Flaps cannot be switched, uneven running at low speed
- Likely causes
- LikelyControl wire chafed through and touching ground
- PossibleInternal short in the solenoid or actuator motor
- PossibleLeaking integrated tumble valve actuator (Subaru Impreza/Crosstrek)
- RareWater or corrosion in the actuator connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.