SOURCE: abs codes co281 & co265
the first of the two codes is for the brake light switch, the one that is under the dash attached to the brake rod and brake peddle. Not much to diag on that one, if its bad it's bad, and when it sets the code that means it's bad.
The second one is for the abs modual, it's under the truck on the drivers side. It is bolted to the top of the thing that has all of the brake lines going to it. MOST all of the time that code is set the modual is bad. It can be a little hard to get the bolts out they are torqs 20 or 25(i'm getting old). There are four of them holding down the modual. There are also a couple of connectors going to it. And some of the time it will blow the fuse for the abs under the hood(its in the underhood fues block). Make sure to clean off the modual before you pull it out. You don't want dirt getting in the solinoids for the BPMV(that's the thing it's bolted to).
SOURCE: 2001 s-10 po 452 and co265
hey i have the same problem with the po452 but i cant find anything. but i also had the co265 problem and turns out it is a faulty abs brake system and the only way to fix it is to get a new brake controule module, its the crome flat thing in the right back corner of the s10 if you where standing in front of it. it has a couple of wires that plug into the bottom and a couple screws holding it down just unplug and unscrew, then the thing should pull straight up it will have six prongs sitting there if you pulled apart the right thing. the only bad thing is finding another one for cheap. i was stressing because you can only get them new from the dealership and they cost a thousand bucks or more, so i went to the junk yard and got one for 5 bucks and havent had the code pop up.
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