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Discussion Starter #1
i am having a problem with my g6 that is starting to be real annoying. my engine light comes on and i used a scan tool to see what was wrong. i got the code p0102 maf or vaf sensor low input circuit and it check to see if my wiring the mass air flow sensor was gettin proper voltage and good ground and it was so i decided to chage the maf sensor. and i used some plastic epoxy to mend a little hold that i found in my intake tubing. i did all of that and cleared the code with a scan tool. and the idle is still not consistent and jumps up and down a bit but no to much. maybe about 100 to 200 rpm it isnt noticable on the dash but u can hear it in the engine. and a couple minutes later after clearing the code it came right back. could someone please tell me what is going on because i felt like i wasted money buying the maf sensor and that did not fix the problem.
 

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Well... you checked the wiring, and that looked good, and you replaced the sensor so it HAS to be clean. And you patched the holes in your intake tubing. Sounds like you did everything one would normally do.

Did you check your air filter? Sometimes a low MAF voltage can be caused by it simply not reading enough air-flow going through... or Maybe something is stuck in the ducting blocking the air flow... perhaps before the filter, like some leaves in the resonator behind the bumper or something.

It's could be a faulty computer as well... but that is HIGHLY unlikely. Did you try to disconnect the battery for a few minutes to give the computer a chance to loose all it's saved settings and therefore needing to relearn everything after the "first" start up?


Also how does it drive. Does it feel sluggish or not as peppy as usual? And how does your MPG look?
 

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Discussion Starter #4
its not slow or slugish at all. when i floor it it does not hesitate or sputter or anything. it idles well in drive and reverse but for some reason in park it jumps a little but not by much like about 300 rpm or 200 its not that noticeable on the dash but you can hear the difference in the engine. it can be my air filter because i know its alittle dirty i will change it and take off the battery terminal for a while and see if that works and also check the tubing for any more leaks or obstructions. but the car has full power tires are burning and all so i dnt understand it. the light is just annoying on my dash lol.
 

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Maybe try and trace the wires as much as you can, See if there is any possible slit or cut in the insulation... How was the condition of the plug itself? Maybe put some dielectric grease in the connector to ensure good connectivity and keep it clean...

I would also pull the entire intake ducting off. Visually inspect the quality of the Throttle Body, maybe give it a good cleaning, Wouldn't hurt. And just check out all the tubing. God forbid but maybe something is inside getting in the way? Highly unlikely but at this point I would check as much of that system as possible...
 

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Discussion Starter #6
ok i will do that as well. but i have another question. my car has hard shifting when it is warmed up especially from first to second gear and park and drive. there are no codes comming up related to this. and i have been told that it is an engine mount but the funny thing is when the car is cold it does not shift hard at all. any ideas what i could be?
 

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but i have another question. my car has hard shifting when it is warmed up especially from first to second gear and park and drive. there are no codes comming up related to this. and i have been told that it is an engine mount but the funny thing is when the car is cold it does not shift hard at all. any ideas what i could be?
That could very well be a result of your maf sensor problem. It's a critical input to the car's overall performance.

You wrote that you found & patched a leak in your intake duct. I'm thinking you may still have an intake leak. If so, intake air is bypassing the maf sensor & possibly causing the 102 low air flow code.
 

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Discussion Starter #8
ive checked just about everywhere for the leak and still cannot find it. can you tell me where else to check for a leak?
 

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ive checked just about everywhere for the leak and still cannot find it. can you tell me where else to check for a leak?
I'm not convinced that you have an intake leak, but it's a possibility. A smoke test is the best way to find out.

Given your description of the symptoms, I'd put most of my money on an open or shorted signal wire between the sensor & the ECM. Do you have the sensor schematic?
 

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Discussion Starter #10
no i dont have the sensor schematic but i will trace the wires as far as i can to see if there are any cuts
 

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THANKS ALOT GUYS!!!! I FOUND THE PROBLEM AND CORRECTED IT. it was a loose pink and black wire from the maf sensor connector. as soon as i corected that and cleared the code everything went to normal. my car idles fine and it shifts extremely smooth from park to drive and all the gears. thank you guys for taking the time out to help me!!!
 

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THANKS ALOT GUYS!!!! I FOUND THE PROBLEM AND CORRECTED IT. it was a loose pink and black wire from the maf sensor connector. as soon as i corected that and cleared the code everything went to normal. my car idles fine and it shifts extremely smooth from park to drive and all the gears. thank you guys for taking the time out to help me!!!
That's the Ign 1 voltage wire supplying the MAF sensor. That connector is a common source of problems.
 
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