2004 didn't have obd II
It should be under the dash to the left of the steering column
Use an OBDII code reader or a scan tool or try disconnecting the battery for a while.
In a 2004 Santa Fe, the OBD-II (On-Board Diagnostics) connector is typically located beneath the dashboard on the driver's side. You can usually find it near the steering column, and it may be concealed behind a cover or panel that you will need to remove to access the connector.
It's located under the driver's side instrument panel
Driver side front seat under dash towards the radio side of the front seat.
In the fuse panel , behind the right front kick panel , ( fuse # 29 ) is a 20 amp fuse for cigar lighter or power point / OBDII diagnostic connector
The 2004 Mitsubishi Lancer has 16 valves.
The 2004 Mitsubishi Outlander has 16 valves.
The 2004 Mitsubishi Lancer has a 5-speed manual.
The 2004 Mitsubishi Outlander is a gas-powered vehicle.
The 2004 Mitsubishi Lancer has an inline 4 engine.
The 2004 Mitsubishi Lancer is a gas-powered vehicle.