P2009 code meaning
Intake Manifold Runner Control Circuit Low (Bank 1)
Powertrain system Generic code P20xx codes Check engine light
What P2009 means
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.
P2009 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2009
- Malfunction indicator lamp on
- Flaps cannot be switched, uneven running at low speed
Common causes of P2009
- Most likelyControl wire chafed through and touching ground
- PossibleInternal short in the solenoid or actuator motor
- PossibleLeaking integrated tumble valve actuator (Subaru Impreza/Crosstrek)
- Less likelyWater or corrosion in the actuator connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Imrc solenoidImrc wiring
What each part of P2009 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 09 | The exact fault in that area. |
What to do next
- Note P2009 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2009
What does P2009 mean?
P2009 means "Intake Manifold Runner Control Circuit Low (Bank 1)". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2009?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2009 fail an emissions test?
Yes, it can. P2009 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2009 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2009 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.