P3468Cylinder 9 Deactivation/Intake Valve Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3468 indicates that the control circuit for the cylinder 9 deactivation or intake valve actuator is pulled high, typically by a short to battery voltage that the module notices once it switches the output on. No manufacturer documents this code publicly; J2012 reserves the codes for cylinders 9 to 12 for engines with more than eight cylinders. Most engines above eight cylinders that shut cylinders down, such as Audi's R8 V10 and Bentley's W12, do so bank by bank without dedicated valve actuators; Mercedes' M137 V12, by contrast, used a solenoid pack. GM's eight-cylinder version of this check counts below 0.5 ohm to controller power with the driver on, 20 of 25 samples. Expect the module to shut the output off and run all cylinders. P3465 (open) and P3467 (ground short) are the other electrical faults here.
- What you may notice
- Check engine lamp on
- Engine runs on all cylinders at all times
- Likely causes
- LikelyCylinder 9 control wire touching a supply wire
- PossibleShorted turns in the cylinder 9 solenoid coil
- RareOutput stage of the engine control module damaged
- 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.