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SES codes???

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Old Jan 29, 2005 | 11:57 PM
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Default SES codes???

My SES light has been on for a while (truck doesnt seem to be running bad) so I borrowed an Innova OBD2 code reader from a buddy and these three codes came up, I cleared the first one and the other two just dissapeared, I waited awhile then went to go drive it to see if the light would come back on and as soon as I started the truck it came back on so I cleared it again and immediately went drive the truck and it never came back on. What exactly do these codes mean??? THANKS!!!!

P0102- Mass or volume circuit low input

P0443- Evaporative emission control system purge control valve circuit malfunction

P0449-Evaporative emission control system vent valve/solenoid circuit malfunction
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Old Jan 31, 2005 | 04:22 PM
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Could someone just tell me if the first code means that my mass air flow sensor is bad or could it be another sensor that I'm not familiar with?? THANKS!!
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Old Jan 31, 2005 | 06:07 PM
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Anyone????????
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Old Jan 31, 2005 | 08:41 PM
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what year is your truck?

not quite sure what those mean. the 1st one sounds like an air intake problem. the other 2 sound like EGR. wish i could help you out more. try posting again in the performance section. might have more visibility there. not sure though
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Old Jan 31, 2005 | 09:33 PM
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Its a 2001 Sierra 5.3, I think the other 2 codes are from when I drove my truck w/ open headers to the exhaust shop. I tried another maf and it set it off again and I tried both maf's in a 2000 tahoe and no codes, so now I'm confused.
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Old Jan 31, 2005 | 09:46 PM
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you have a cut wire going to the maf or bad plug there or lose connection. the maf wire is not to long just folllow it back and see if it cut any where.That or your maf is bad.
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Old Feb 1, 2005 | 10:27 AM
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After the second maf I tried triped the same code , thets what I was thinking, cut wire or bad connection. THANNKS!!!
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Old Feb 1, 2005 | 08:59 PM
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Also the EVAP codes can get thrown by a loose or worn gas cap seal. Make sure you turn the cap until you get the clicks ( two or three ). Else look into replacing the cap, pretty cheap if it keeps coming back.
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Old Feb 3, 2005 | 07:14 PM
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Well, found the problem, a burnt fuse under the hood (ENG 1), We checked the voltage to the wires on the plug and the pink wire didnt have 12v so we started checking fuse we thought might be the problem and BINGO, found a burnt one! Thanks for all the help.
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Old Feb 3, 2005 | 07:46 PM
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Originally Posted by bodyguard6799
Well, found the problem, a burnt fuse under the hood (ENG 1), We checked the voltage to the wires on the plug and the pink wire didnt have 12v so we started checking fuse we thought might be the problem and BINGO, found a burnt one! Thanks for all the help.

glad to hear it was an easy and cheap fix
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