Join Date: Jun 2008
Location: Brampton, Ontario, Canada
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The last time I had a truck in with those two codes, it turned out that whomever was the last one under the hood left MAF/IAT #1 connector unplugged. And yes, IAT #1 is integrated into the MAF sensor, just as any Ford gas engine powered vehicle has been since 2003. This is why MAF sensors now have six wires instead of four.
But in answer to your last question, I would check the MAF/IAT #1 harness for an open circuit between connector and the PCM before jumping the gun and replacing it. If the vehicle in question has one of those aftermarket "re-usable" type filters in them, sometimes the oil will get onto the sensor element as well, and cause the readings to go haywire.
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Ford Diesel/Senior/Master Tech who placed 2nd overall in Ontario on the Fix-It-Right-First-Visit score for 2010
....who works at a dealership that now employs SOME half decent looking female employees since they overhauled most of the administrative staff
....but STILL loves hot women with big boobies
....and STILL hates working on E-Series with 6.0L
Last edited by m-chan68; 03-02-2010 at 07:25 PM.