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SES light on and code p102

This is a discussion on SES light on and code p102 within the General Help forums, part of the LSx Technical Help Section category; What would be wrong with my car possibly if I'm thowing the p102 or something like that code, It said ...

  1. #1
    Impounded LS1 Trans am's Avatar
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    SES light on and code p102

    What would be wrong with my car possibly if I'm thowing the p102 or something like that code, It said something like Mass Air Flow: Low Voltage or something like that. What would cause that? I was thinking it could be my alternator, because when I start my car my tach and speedo go all the way up and down real slow and also it resets my trip, Any ideas?

  2. #2
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    P0102? See www.gearchatter.com/viewtopic8916.php

    The gauge sweep/trip resetting to zero is from low battery voltage on the '99 cars. Here's the TSB on it: http://home.earthlink.net/~cetera/pics/aug99tsb.jpg

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    Member 89LX's Avatar
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    Hot Wires

    2001NBMZ28 has your information in his link. It is as stated in the Service Manual. I noticed you ported your Maf. Make sure you didn't damage the hot wires. They keep a fixed temperature above ambient temperature.
    2000 Z28 M6, SLP Lid, SLP Bellows, SLP UD,
    P&P Maf, TB By-Pass, PS Shorties, LS6 Intake, FAST 78mm TB, Hooker CB, Hurst Billet, Front Tower Brace, small 218/218....527/527....114 cam.
    337rwhp/348rwtq

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    Impounded LS1 Trans am's Avatar
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    It was working and then I just had the voltage regulator replaced on the alternator, that's why I think it's the alternator messing with my voltage. It wasn't throwing this code until after the alternator was fixed. I'm about to go to o'reilys and get a new one with a lifetime warranty for $108 before it messes up something.

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    Custom Built Rock Crawler rustynuts's Avatar
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    Quote Originally Posted by LS1 Trans am View Post
    I'm about to go to o'reilys and get a new one with a lifetime warranty for $108 before it messes up something.


    when i can expect the $ that is owed for you know what?

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    Impounded LS1 Trans am's Avatar
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    97 LT1 trans am

    Ran the tests off that website provided (although all I have is a test light and a ohm meter) and I had 5 volts between the signal and a ground and had the test light go off when I tested the ignition+ to the ground and then I found the engine sensor fuse was blown. So I replaced the fuse and went for a ride and the service engine light never went off, then when I got back I found the fuse was blown again. Any ideas?

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    Member 89LX's Avatar
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    Again....did you check your wires in the MAF for damage or trash?

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    Impounded LS1 Trans am's Avatar
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    Talking about taking the maf apart or the 3 wires that are in the opening? Those wires arn't broken. Anything else? What about my alternator, it never hummed when I just turn my key on.. Maybe it's doing something crazy? Like to much voltage or not enough.

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    Custom Built Rock Crawler rustynuts's Avatar
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    .













    Quote Originally Posted by rustynuts View Post
    when i can expect the $ that is owed for you know what?










    .

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    Impounded LS1 Trans am's Avatar
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    Anything else on the MAF?

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    Custom Built Rock Crawler rustynuts's Avatar
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    Quote Originally Posted by LS1 Trans am View Post
    What would be wrong with my car possibly if I'm thowing the p102 or something like that code


    IT'S PROBABLY YOUR CARS CONCIOUS TRYING TO TELL YOU TO STOP RIPPING PEOPLE OFF!!!!!!!!! YOU'RE A REGULAR GENIOUS AREN'T YOU?????


    BEWARE OF LS1 TRANS AM. HE SCREWED ME OVER, DON'T LET HIM SCREW YOU OVER.


    READ ALL ABOUT HIM HERE

    http://www.ls1.com/forums/showthread...871#post766871




    .............

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    Quote Originally Posted by rustynuts View Post
    Sold!!

    thanks robert
    ............
    I like how friendly you were back in December. j/k.

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    Veteran 0rion's Avatar
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    Quote Originally Posted by LS1_TA_2002 View Post
    ............
    I like how friendly you were back in December. j/k.
    I would maybe consider making this right with him. Think about how you would feel if someone sold you a part without telling you there was something wrong with it. Just ain't right.

  14. #14
    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by 0rion View Post
    I would maybe consider making this right with him. Think about how you would feel if someone sold you a part without telling you there was something wrong with it. Just ain't right.
    Ditto.

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    I Love High-Explosives! TheChad1371's Avatar
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    very shady business...

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