OBD-II · Engine and powertrain (P)
P2009
Intake runner (swirl) flap control circuit low bank 1
What it means
Intake manifold runner flaps - called swirl flaps on diesels - change how air enters the cylinders at low rpm. The flap control circuit voltage is below the valid range.
Symptoms
- engine warning light
- often no noticeable change
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | control wire shorted to ground |
| 02 | failed actuator or solenoid |
| 03 | corroded connector |
What to check, step by step
- 01Inspect the actuator/solenoid connector and wiring.
- 02Measure actuator or solenoid resistance against specification.
- 03Check supply voltage and continuity to the engine computer.
- 04Replace the faulty actuator or solenoid.