MAF help trouble codes P0175, P0172, P0153 -

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MAF help trouble codes P0175, P0172, P0153

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Old 12-06-2010, 09:42 AM   #1
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Default MAF help trouble codes P0175, P0172, P0153

I have trouble codes P0175 (rich bank 2), P0172 (rich bank 1), and P0153 (circuit condition O2 sensor bank 2). I went to autozone and they printed them out for me. On the Probable cause part for the P0172/175 codes it says if they are both going off then suspect a fuel pressure condition or MAF sensor fault. I know I don't have a fuel pressure condition but how would I know if my MAF is at fault without replacing it? I visually inspected the tube and it's brand new type of clean (it's only 3 years old). One thing to note, My K&N air filter was so filthy that it had sludge in the crevices (I'm cleaning it now). But I still don't think that could cause those 3 codes to go. I could have a bad O2 sensor but it wouldn't explain both banks being rich. One of my O2 sensors went bad last year and I replaced that one. Only the front O2 sensors are activated because I have no cats.

Any suggestions? if more info is needed let me know.
99 gt vert, auto, 50 lbs. inj., 2800 stall, transgo stage III shift kit, 3.55 gear, Trick Flow Twisted Wedge Heads, Comp Cams blower cams, forged internals with 18.1 cc dished pistons (8:1 CR), 75 mm TB, CAI, MSD Ig. coils, coated long tube headers w/offroad pipes, eibach pro damper, SCT Livewire tuner, Saleen Series IV SC w/ 2.8" pulley, Chicane intercooler, LFP Heat Exchanger, and Nitto 555 drag radials. 398 rwhp / 342 rwtq.
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Old 12-06-2010, 06:01 PM   #2
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Try cleaning your MAF and see if that helps at all... Could just be a bad MAF reading causing you to run rich.

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Old 12-06-2010, 07:24 PM   #3
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Ford has a big thing with K&Ns and 6.0s... they say the oil on the filter clogs the MAF element. I've also seen dead bugs on the MAF cause issues as well as other blockages.
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