2001 blazer obdII code P0102

[soarjkelly]

my blazer shows a code p0102,low voltage to circuit,car has no power and does not drive that far without almost stalling,also when in park car wont tach past 2k without stalling-my ques. is this a pcm problem or somethingelse

[BlazerLT]

MAF sensor needs cleaning.

Remove it and spray throttle body cleaner through it on the sensor wires and dissolve the black gunk covering them.

Then reset your computer and start it up.

[soarjkelly]

thanks blazerlt but i already c/o the maf but didnt reset the computer-i also see a problem with the voltage with everything running it hits about 11 or 12 the battery is new as of 12/01 so maybe a problem w/alt?

[BlazerLT]

Originally Posted by soarjkelly

thanks blazerlt but i already c/o the maf but didnt reset the computer-i also see a problem with the voltage with everything running it hits about 11 or 12 the battery is new as of 12/01 so maybe a problem w/alt?

Alternator needs changing.

What is c/o the MAF mean?

[soarjkelly]

maf=mass air flow sensor located between air filter and thorttlebody

[BlazerLT]

jesus, I know what MAF means, what does C/O mean?

[soarjkelly]

changed out

[BlazerLT]

Replace your alternator.

[soarjkelly]

had alt. checkout at autozone they said it's ok now i have no clue,maybe egr?something w/the fuel sys?

[BlazerLT]

Having your vehicle stall out and the voltage gauge reading low is a tell tale sign of a bad alternator.

Do this, buy a new alternator, install it and if the problem does not go away you can return it. Alternators are very easy to install in about 15 minutes.

I don't trust the alternator test at autozone seeing there has been many that have had it tested there only to find out that their alt is bad even though it tested ok.

It is that or the battery. Take a voltmeter out and test the battery with the engine off and the engine runnign and come back here and tell us the readings.

[soarjkelly]

thanks LT for the info,i just bought the battery at the start of the week,but would the alt have anything to do with not being able to rev up past 2k?and also can anyone tellme how to clear out the computer on a 2001? i'm getting different answers on this problem

[BlazerLT]

You never said it wouldn't rev past 2k. Hmmmm... this kind of information needs to be brought forth in the first place.

Before we move on tell me this, have you checked for anymore engine codes?

[soarjkelly]

yeah i did but anyways i can get 2 codes,a p0102and P0302 random or multiple misfires are it

[BlazerLT]

This might be a defective MAF sensor. That or a broken wire somewhere.

Check you coil out at night with it completely dark and look for blue spark arcing around the coil.

[soarjkelly]

thanks LT I'll try it later