P3465Cylinder 9 Deactivation/Intake Valve Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3465 flags an open circuit to the actuator meant to shut down cylinder 9 or hold its intake valve closed. No manufacturer documents this code publicly; J2012 reserves the codes for cylinders 9 to 12 for engines with more than eight cylinders. Among such engines, Mercedes' M137 V12 (S 600 and CL 600, 1998 to 2002) had a shut-off system built around a solenoid pack and oil pressure tubes, whereas Audi's R8 V10 idles a whole bank by stopping injection and ignition. For orientation, GM treats the comparable circuit on its V8s as open above 200 kohm with the driver off, 20 failures in 25 samples. P3467 and P3468 cover shorts on the same line, P3466 a mechanical fault, P3469 the exhaust side of cylinder 9.
- What you may notice
- Check engine lamp on
- Cylinder shut-off no longer engages
- Slightly higher fuel consumption at part load
- Likely causes
- LikelyBroken or chafed wire to the cylinder 9 actuator
- PossibleOpen coil in the cylinder 9 solenoid
- PossibleLoose or corroded connector at the solenoid pack
- RareOutput stage in the engine control module failed
- 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: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.