MAF code on the Yukon

[Compstall]

Ever since I installed a CAI on our Yukon I get an intermittent Check Engine light. Scanning the code, I get a P0101 code for Mass Air Flow (MAF) Circuit Range/Performance Problem

I'm just wondering if the larger volume of air from the CAI is screwing with the MAF. Is the system THAT sensitive to changes? Truck doesn't run any different - the light just comes on and off. Sometimes it will stay on for days, other times it will come on, then go off, etc.

I've tried to find specific things that may make the light come on, and the only thing I've seen consistent to make the light come on is when giving it just enough throttle to put the engine under load, but not quite enough to make the trans downshift.

Example: We drove to Phoenix for vacation a couple weeks ago. Stopped at a rest area near Flagstaff, truck was doing just fine w/ no light on. Started it up and got on the highway, and as the truck was accelerating (I kept just enough throttle on to accelerate fairly rapidly without going WOT) the light came on. It stayed on for 2 days after that, then went away.

Only theory I can come up with is the combination of living/driving at high altitude and the CAI kit I put on the truck.

[PONYEATER]

you sure you don't have the MAF on backwards?

[Compstall]

Heh, good idea. I'll go take a look later today, although I'm pretty sure I re-installed it correctly.

I almost hope I did install it backwards - easy fix!

[Compstall]

I checked, and the MAF is oriented properly.

[tjwong]

Stick the GM CAI back on and see if the problem goes away, if it does then the diagnostic can be edited to fix the issue.

[DoubleTapDrew]

Is it a K&N? One of our techs has mentioned problems with those being over-oiled, the oil gets sucked onto the MAF wires and throws codes.

[Compstall]

I bought an AiRaid kit. Yes, I've cleaned the wires on the MAF too.