P3496 code meaning
Cylinder 12 Exhaust Valve Control Circuit High
Powertrain system Generic code P34xx codes Check engine light
What P3496 means
P3496 is the final code of the per-cylinder valve block: it marks the cylinder 12 exhaust valve control circuit as too high, typically a short to battery voltage or a coil with shorted turns. No manufacturer documents this code publicly; J2012 reserves the codes for cylinders 9 to 12 for engines with more than eight cylinders. Bentley built its last W12 in 2024 after describing a shut-off that idles one bank of six under part or trailing throttle, and the Lamborghini Aventador V12 shut one bank below 135 km/h; neither documents an exhaust actuator for cylinder 12. The clearest public account of exhaust valves following their own switching sequence remains a GM patent. Should the code appear, the module will disable deactivation. P3493 (open) and P3495 (low) complete the set, P3497 is the bank 2 system code.
P3496 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 P3496
- Check engine lamp on
- Cylinder shut-off disabled
Common causes of P3496
- PossibleExhaust actuator wire of cylinder 12 shorted to battery voltage
- PossibleShorted turns in the exhaust actuator coil
- Less likelyEngine control module output 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 P3496 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). |
| 96 | The exact fault in that area. |
What to do next
- Note P3496 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 P3496
What does P3496 mean?
P3496 means "Cylinder 12 Exhaust Valve Control Circuit High". P3496 is the final code of the per-cylinder valve block: it marks the cylinder 12 exhaust valve control circuit as too high, typically a short to battery voltage or a coil with shorted turns. It is a generic code, so it means the same on every make.
Is it safe to drive with P3496?
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 P3496 fail an emissions test?
Yes, it can. P3496 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 P3496 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 P3496 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.