P3471Cylinder 9 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
- A low reading on the control line of the cylinder 9 exhaust valve actuator triggers P3471, most often a wire grounded against the engine or body. No manufacturer documents this code publicly; J2012 reserves the codes for cylinders 9 to 12 for engines with more than eight cylinders. Because known shut-off systems on engines above eight cylinders either drop a whole bank by fuel and spark (Audi R8 V10) or close the valves with one shared actuator per cylinder (as in GM's design), a separately wired exhaust actuator on cylinder 9 would be unusual. If such a circuit is present, test it the same way as the intake circuit: resistance to ground with the connector unplugged, then the coil. P3469 is the open-circuit fault, P3472 the short to voltage, P3467 the matching intake code.
- What you may notice
- Check engine lamp on
- Partial-cylinder mode unavailable
- Likely causes
- PossibleExhaust actuator wire of cylinder 9 grounded
- PossibleInternal short in the exhaust actuator
- RareEngine control module output 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.