P3479Cylinder 10 Exhaust Valve Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P3479 shows a short to ground, or another cause of a low signal, on the control line of the cylinder 10 exhaust valve actuator. No manufacturer documents this code publicly; J2012 reserves the codes for cylinders 9 to 12 for engines with more than eight cylinders. Engines with ten or more cylinders that deactivate cylinders include Audi's R8 V10, Lamborghini's Huracán V10 and Aventador V12, and Bentley's W12; the published descriptions of all of them talk about whole banks, not about a valve actuator per cylinder. If an engine does carry one, the check mirrors the intake low test known from GM's V8s: resistance to ground with the output off. Repair is wiring or actuator work around cylinder 10. Siblings: P3477 (open), P3480 (high), P3475 (intake low).
- What you may notice
- Check engine lamp on
- Fuel-saving cylinder shut-off inactive
- Likely causes
- PossibleExhaust actuator wire of cylinder 10 shorted to ground
- PossibleExhaust actuator shorted internally
- RareControl module output stage faulty
- 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.