2.4 Engine- Sorry , Its noob question time

[BazW]

HI all, new to Jeeps and have a few noob questions if I may.

I have a 2.4 l kj sport.

Q1 what is the idle speed for the 4 pot? mine is running at 1024 according to my diagnostics gear.

Q2 It is showing some codes ,

P0031
P0037
P0135 and
P1491

I assume the first 3 relate to the O2 sensors being faulty and I assume the 4th is the cooling fan will not work as the relay has a fault.

whould this be fair?

Q3 what is the service intervals for oil, cam belt and such?

Thanks in advance and stay healthy in these serious times

 

[LibertyTC]

Many here may not know much about the 2.4 motor, I should be able to help get U the Factory manual though. What year is your 2.4 Jeep?

 

[BazW]

Many here may not know much about the 2.4 motor, I should be able to help get U the Factory manual though. What year is your 2.4 Jeep?

2002

 

[LibertyTC]

Here is the manual, note that there is a separate 2.4 gas system index.
http://www.colorado4wheel.com/manuals/Jeep/KJ/2002JeepKJServiceManual.pdf