P3468 code meaning
Cylinder 9 Deactivation/Intake Valve Control Circuit High
Powertrain system Generic code P34xx codes Check engine light
What P3468 means
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.
P3468 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P3468
- Check engine lamp on
- Engine runs on all cylinders at all times
Common causes of P3468
- Most likelyCylinder 9 control wire touching a supply wire
- PossibleShorted turns in the cylinder 9 solenoid coil
- Less likelyOutput stage of the engine control module damaged
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Cylinder deactivation solenoidWiring harnessECM
What each part of P3468 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 3 | Mixed range: generic and manufacturer-specific codes. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 68 | The exact fault in that area. |
What to do next
- Note P3468 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P3468
What does P3468 mean?
P3468 means "Cylinder 9 Deactivation/Intake Valve Control Circuit High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P3468?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P3468 fail an emissions test?
Yes, it can. P3468 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P3468 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P3468 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.