P3429

DTC P3429, sometimes indicated as P342900 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing cylinder 4 exhaust valve control circuit/open.

The Cylinder 4 Exhaust Valve Control Circuit/Open code means that there is a problem with the valve control circuit for cylinder 4. This could be caused by a number of things, including a bad valve, a wiring problem, or a problem with the ECU.
If you have this code, the best thing to do is to take your car to a mechanic and have them diagnose the problem. They will be able to tell you what is causing the code and how to fix it.

• P3429: Cylinder 4 Exhaust Valve Control Circuit/Open
• P3429: Exhaust valve control, cylinder 4 – open circuit
• P3429 00: Exhaust valve control, cylinder 4 - open circuit