P0102 Mass air flow sensor replaced code comes back - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-19-2007, 06:27 PM   #21
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Old 08-19-2007, 08:39 PM   #22
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thanks for the help and to use the scanner. I may be screwed and have to take it to shop since I have to travel for work for the week starting tomorrow so i will leave car at shop. But see what happens all keep you updated
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Old 08-19-2007, 10:25 PM   #23
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I went thru the same thing just a few months ago, same symptoms, same cleaning, same research, same troubleshooting...

The garage is going to put a scanner on your car, See the MAF code and throw a new MAF on it. Why not save the diagnostic fee and their markup and put a new MAF on it? Persoanlly I would try another junkyard pull off a lower mileage car.

Another thing to consider is that the low voltage code can also mean that air is getting in unmetered (ie - not thru the TB) which is why I suggested checking for an intake/vacuum leak. That code basically means the computer is seeing that the maf reading is much too low for the rpm'* the engine is turning.
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Old 08-19-2007, 10:46 PM   #24
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Thanks for the info, What is the easiest way to test for vacuum? If when I get home next weekedn if there is still issues then all try more troublwahooting but kinda screwed because of travelling with work. Gonna give the garage very specific instructions and hope they dont screw around I have old MAF and junk Yard pull I really doubt both are bad but I have been wrong before. Still can't understand why it doesnt seem to be an issue most of the time and did get better with replacment
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Old 08-19-2007, 11:04 PM   #25
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A spray bottle of water or a can of carb cleaner usually works well. Spray it on and if it the fluid gets sucked in theres a leak there.

Do you know anyone else with a 3800 that you could borrow their MAF?
As for the yard pull, if the body is still good then the car'* not there because it was running great; if you know what I mean. I'd pull from that was hit in the rear.

My wifes Olds did the same thing, would run fine for weeks at a time then BOOM - Check Engine. IT was frustrating to say the least.
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Old 09-01-2007, 02:25 PM   #26
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Well apparently I just have **** luck and it was the junk yard sensor was also bad. So I put new one in and it works perfectly now
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Old 09-02-2007, 10:45 AM   #27
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Glad to her shes fixed! Thanks for updating us.
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