H3 Check engine light advice

[spillKill]

So this morning I notice my check engine light is on, I plan on taking it to auto zone to find out what code it throws when I get off work. The latest mod I have done is the intake and I also used an oiled filter but has only been on for a few weeks and I know that can mess with the sensor but what do u guys think?

 

[ArtHummer]

I never like the oiled filters. All the exes oil will go in to the throttle body and intake and will collect the dust. Could affect the MAF reading.

 

[alrock]

I agree with ArtHummer. The oiled filter may have caused the issue. I stopped using an oiled filter as I believe the paper ones filter better, which is especially important off road.

The AFE dry, washable filters may the the way to go if you want a reusable filter

 

[spillKill]

What's the best way to clean the sensor just a dry rag? And thanks for the advice

 

[alrock]

Do not touch the Mass Air Flow (MAF) with anything! Get a can of MAF cleaner at any auto parts store. Disconnect electrical connection and remove sensor from the intake. Spray sensor with MAF cleaner. Between the solvent and the force of the aerosol the contaminants will be removed. Allow to air dry and put back in place

Touching the sensor may cause it to fail or at least throw more codes

 

[ArtHummer]

There is a good write up about cleaning the throttle body and MAF
http://www.hummer4x4offroad.com/for...le-body-and-MAF-sensor-cleaning&highlight=MAF

 

[spillKill]

Thanks guys really appricate it gonna get on that as soon as I get off work. Also is it possible for me to wash the filter I have to remove the oil in it?

 

[alrock]

There are cleansers meant for removing the dirt and oil. But those filters should not be operated without oil. The oil attempts to make up for the more porous material and trap dirt.

In my opinion it is difficult to find the balance between too much oil and too little

 

[spillKill]

Well the code was p0171 bank 1 fuel system to lean. One of the causes was oil/dirty sensor, but I got some cnc cleaner and fixed it right up thanks alrock and arthummer!!