check engine light

[sblanck]

Check engine light came on the 2004 Jeep Liberty.
I changed the oil fluid and filter, transmission fluid and filter.
spark plugs and PCV valve.

I am good about the gas cap.

Jeep has 107 k on it.

What else could cause the light to come on?

Thanks

 

[tjkj2002]

About 2000 other issues.Need to get the code pulled to narrow it down some.

 

[Elliott]

Put your key in the ignition and go from off to on to off to on to off and then on. You have 10 seconds max to do this. In the odometer readout the error code(s) will display. Look them up or post them here to find out what the problem is.