P3493

DTC P3493, sometimes indicated as P349300 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 12 exhaust valve control circuit/open.

The code P3493 is set when the PCM detects an open or shorted condition in the exhaust valve control circuit for cylinder 12. This can be caused by a defective exhaust valve, a wiring problem, or a problem with the PCM.
If the code is caused by a defective exhaust valve, the valve will need to be replaced. If the code is caused by a wiring problem, the wiring will need to be repaired. If the code is caused by a problem with the PCM, the PCM will need to be replaced.

• P3493: Cylinder 12 Exhaust Valve Control Circuit/Open
• P3493: Exhaust valve control, cylinder 12 – open circuit
• P3493 00: Exhaust valve control, cylinder 12 - open circuit