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how do i fix this code? P1626

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Old 09-16-2007, 04:13 PM   #1
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how do i fix this code? P1626

i scanned my truck and came up with this

P1626 Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit Malfunction

what n the world does this mean and how can i fix it cause my truck runs like crap
Old 09-16-2007, 11:21 PM   #2
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Re: how do i fix this code? P1626

mods or anyone who works at a gm dealership i could really use some help with this one.
Old 09-17-2007, 12:49 AM   #3
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Re: how do i fix this code? P1626

here man..dont know if it will help, but looks useful http://www.gearchatter.com/viewpost14016.php
Old 09-17-2007, 12:51 AM   #4
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Re: how do i fix this code? P1626

oh and this too lol http://findarticles.com/p/articles/m...1/ai_n15871185
Old 09-17-2007, 01:38 PM   #5
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Re: how do i fix this code? P1626

wow thats some tuff stuff to understand.

ok so where is the
VTD?
BCM?
PCM?
Old 09-17-2007, 02:58 PM   #6
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Re: how do i fix this code? P1626

body control module (BCM)
powertrain control module (PCM)

Those were in the 2nd article.

I'm guessing VTD would be Passlock, GM's Vehicle Theft Deterrent (VTD), but that's purely a guess.
Old 09-17-2007, 07:48 PM   #7
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Re: how do i fix this code? P1626

haha i read the pages, i asked where? as in can i located them on my truck to see if anything is wrong. were are they located?
Old 09-17-2007, 08:01 PM   #8
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Re: how do i fix this code? P1626

The BCM and PCM are under your dash in the center. Its over the hump in your floor, directly under your stereo/ac area. I would bet your passlock is screwed up. Sorry I can't tell you where to go from there.



I got to mine from the driver's side, WAY up under there.

Last edited by leroyme; 09-17-2007 at 08:02 PM.
Old 09-17-2007, 08:19 PM   #9
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Re: how do i fix this code? P1626

do i have to take the dash out or can it be reached from underneath. also what does it look like/what am i looking for?

leroyme......why did u have to/what did u do to yours?
Old 09-17-2007, 08:27 PM   #10
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Re: how do i fix this code? P1626

itcould be your ignition, bcm, or wires. that code means that the pcm is not receiving the signal from the bcm to turn on your injectors. the bcm needs the signal from your ignition lock cylinder. if it doesnt see the same key on signal as the previous then the bcm will prevent the engine from starting. these parts are not cheap. i think the ignition goes for 400.00 and the bcm sells for 300.00-400.00. your most likely cause is the ignition.
Old 09-17-2007, 08:35 PM   #11
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Re: how do i fix this code? P1626

my truck starts and runs great......until u go under a load or are on the freeway then it studders and seems to not get enough gas......n other words, im still driving it to school and work everyday, its just a pain in the ass cause its hard to get up to speed and merge. its also embarassing cause i have exhaust thats makes it noticable to others that it runs like crap lol
Old 09-17-2007, 11:04 PM   #12
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Re: how do i fix this code? P1626

anyone have a pic or discription of the bcm? i need to know what im looking for lol. thanks
Old 09-18-2007, 06:34 AM   #13
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Re: how do i fix this code? P1626

if you're having this stumble/hesitation problem at highway speeds, it's not caused by that DTC. the diagnostic for that DTC runs when the ignition switch is turned to crank. the BCM talks to the PCM and decides whether the PCM will provide fuel. if you have a remote start, this code is commonly in every PCM i've gone into.

as far as you problem with the truck... i'd check your fuel filter. you didn't mention if it is a 4.3, or 2.2... but either way i've seen a ton of drivability problems due to clogged fuel filters. if its a 4.3, i'd check the cap and rotor for a "snowstorm"... thats when all of the terminals in the cap and rotor have this white corrosion stuff all caked onto the terminals
Old 09-18-2007, 01:45 PM   #14
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Re: how do i fix this code? P1626

well i got a 2.2 lol this is in the 2.2 section, and when my truck was scanned, it currently has this code P1626. i have replaced the fuel filter,cat, plugs, wires, coils, cleaned egr carbon...

either way id like to see what the bcm looks like. what am i looking for lol
Old 09-18-2007, 01:49 PM   #15
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Re: how do i fix this code? P1626

hey chris you have a scanner? could it scan for why my abs light is on?
Old 09-18-2007, 02:20 PM   #16
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Re: how do i fix this code? P1626

joe help me with the scan, his brother has one
Old 09-18-2007, 03:29 PM   #17
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Re: how do i fix this code? P1626

Quote: Originally Posted by chevyDime98
haha i read the pages, i asked where? as in can i located them on my truck to see if anything is wrong. were are they located?
Sorry, reading > me.
Old 09-18-2007, 07:54 PM   #18
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Re: how do i fix this code? P1626

bcm should be mounted under the drivers kick panel. its hiding under the steering column.
Old 09-19-2007, 01:56 AM   #19
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Re: how do i fix this code? P1626

cool, what does it look like.
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