P065FIntake Manifold Tuning Valve Performance Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The intake manifold tuning valve switches the manifold length or plenum connection with engine speed (more torque low, more power high); it is not the runner or swirl flap (IMRC, P2004 ff). P065F is the function check of the bank 2 valve: it does not follow its command, detected via a position sensor or the intake pressure pulsation (GM patent). Bank 2 codes require a V-engine manifold with two separately switched valves; many V engines use a single central valve between the plenums, and no manufacturer document available to us uses this code, so the description follows bank 1. A stuck valve causes a torque gap in one rev band and can make the banks fill unevenly. Bank 2 circuit faults are P0663–P0665.
- What you may notice
- Check engine light (depending on the maker)
- Torque gap in one rev band
- Noise from the intake manifold
- Likely causes
- LikelyBank 2 valve or shaft sooted or stiff
- PossibleLinkage between actuator and valve broken or unhooked
- PossibleBank 2 actuator faulty internally
- RareManifold or vacuum leak
- 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: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.