Cel p0100 - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

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post #1 of 18 (permalink) Old 10-16-2010, 09:53 AM Thread Starter
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Cel p0100

I know what P0100 is, it's related to the circuit malfunction of the MAF. I've tried everything (new filter, new MAF) I only have a couple things left to knock off on the list, but if anyone knows how to take care of this (while avoiding the dealership since they are always "booked") i'd appreciate the help.

New Filter done
New MAF done
Disconnect battery overnight (done but have to reconnect it now lol)
Reinstalling factory bpv spring (take out dejon spring) next
Why can't service manuals be $40 instead of $135
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post #2 of 18 (permalink) Old 10-16-2010, 09:57 AM
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Originally Posted by parise9 View Post
New MAF done
Disconnect battery overnight (done but have to reconnect it now lol)
This might fix it now if you did not do this when you replaced the MAF. Let us know when you get it hooked back up and drive it a little. Welcome to the forum, BTW

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post #3 of 18 (permalink) Old 10-16-2010, 10:28 AM
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You'll have to drive like 40 miles tho.

---------- Post added at 01:28 PM ---------- Previous post was at 01:28 PM ----------

Checked the fuse?

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post #4 of 18 (permalink) Old 10-16-2010, 10:29 AM
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Yeah I forget the perspective. In Tennessee 40 miles is driving a little bit. lol

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post #5 of 18 (permalink) Old 10-16-2010, 10:42 AM
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If you already replaced the sensor, then if the code doesn't clear out then you more than likely have a wire open/shorted.

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post #6 of 18 (permalink) Old 10-16-2010, 12:25 PM
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The code has to be cleared you know. It won't go off on it's own

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post #7 of 18 (permalink) Old 10-16-2010, 12:47 PM Thread Starter
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alright. cleared the code. did the battery disconnect reconnect overnight. started it up today, no engine code.......... at first. was having mechanical issue with boost, I already knew the dejon spring was notorious for causing this, so I replaced it with the stock bpv spring. guess what.... start it up, engine code lol. since the mechanical boost issue is gone, i'm assuming it's the same code. I haven't check yet cause I'm updating my programmer, but more than likely that's what it is.

so now i see 4 options
1 it didn't like the reinstall and start up so quick, so just clear it and redo the battery deal
2 it's the same code cause a wire shorted (sucks dealership fix)
3 it's a fuse like someone said to check which i will once i check the code
4.... it's a lame bucket of bolts lol j/k
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post #8 of 18 (permalink) Old 10-16-2010, 03:45 PM
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The code has to be cleared you know. It won't go off on it's own
Yes it will. Usually after three to five consecutive ignition cycles (sometimes more) with no malfunction it turns off, and after 100 it clears from module memory.

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post #9 of 18 (permalink) Old 10-16-2010, 04:00 PM
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If u say so

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post #10 of 18 (permalink) Old 10-16-2010, 04:15 PM Thread Starter
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Quote:
Originally Posted by BlackBaltSS View Post
Yes it will. Usually after three to five consecutive ignition cycles (sometimes more) with no malfunction it turns off, and after 100 it clears from module memory.
yeah, onStar said to go for seven ignition cycles.
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