P20F9Intake Manifold Runner Control Circuit Performance (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P20F9 is the bank 2 counterpart of P20F8: the runner or swirl flaps of the second cylinder bank do not track their commanded position. It needs a V engine whose banks have separately driven flaps, each with its own position feedback. No manufacturer documents this code publicly; GM and Mazda only use the bank 1 code P20F8. GM's diesel logic for P20F8 shows how such a test works: set point and measured position are compared continuously, and a deviation above 10 % in most samples counts as a fault with warm coolant and a supply above 11 V. CARB's comprehensive component rules require functional checks of such actuators where they affect emissions. Directional faults on bank 2 are P2005 (stuck open) and P2007 (stuck closed); electrical faults are P2011–P2013. Expect the MIL and possibly uneven running between banks.
- What you may notice
- Malfunction indicator lamp on
- Uneven idle or reduced torque at low speed
- Likely causes
- LikelyBank 2 flaps sticking from deposits
- PossibleBank 2 actuator or position sensor faulty
- RareBroken or detached linkage between actuator and flap shaft
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.