2004 mitsubishi galant service engine soon light remains on. we have had oil changes etc. what could be the problem

Look for issues in the wiring to

Interior lights
Cigarette lighter
Number plate light(s) (saloon)
Parking lights
Tail lights

Fuse box diagram Mitsubishi Galant

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Fuses and relay Mitsubishi Galant 1997-2004. For the Mitsubishi Galant (EA) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 model year. Fuse box in passenger ...

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your o2 sensor bank 1 is bad . you may want to replace it. It will probably solve your problem but make sure your maintainance is up to date fuel filters air filter plugs and wires. If this was helpful please leave good feed back

hi Stephen
Service engine soon means you have a fault in the engine management system.
you have to take your car to the garage for diagnostic
good luck

the engine service soon indicate may be you need to change oil or you need to replace timing belt

Every 9,000 miles ( 14,000 km) and there is no need to flash the engine, just get the engine specified by the manufacturer.

if your talking about the check engine light being on, no, it will not come on because of oil service time. you may of left something off. if the dipstick or oil cap is loose this could set a code.

I need a radio code for my 2000 mits. galant. what do i do w/out paying 75 bucks for it. where do i find it?? is it somewhere in the car???

Glad I can help. :)

replace o2 sensor.

First,and most obvious is to check the oil level.If the oil has recently been changed,change the oil filter again just to eliminate any possible defective filter.If condtion still exists,a mechanical oil pressure test gauge can be hooked up to the engine and driven while monitoring the oil pressure.I use this procedure sometimes on automatic transmissions as a diagnostic tool.This test will identify if the problem is indeed a mechanical fault inside the engine,or a potential problem with the dash gauge,or sensor,or wiring.As a temporary solution,using a slightly thicker viscosity oil will help somewhat if a low pressure condition actually exists.