Just got my lemur Bluetooth scanner and ran it on my 01 blazer hoping id find a code for each of these lights but I was given a list of 15 total codes....
ABS:
C0221 - Right Front Speed Sensor or Circuit Open
C0265 -
C0251 - EBCM control valve circuit
C0246 -
C0242 - Engine Control Module Indicated Traction Control Malfunction
C0252 -
C0245 -
C0241 -
C0222 - Missing Right Front Speed Signal

Airbag:
B0036 - ADS Open/missing/shorted to battery
B1000 -
U1000 - Class 2 communication malfunction
U1041 - Lost communication with EBCM
U1096 -
U1064 - Lost communication with BCM or VCD module

Now I found tech bulletins for some of these codes and the app itself lists some possible causes on where I should look but before I get started on trying to fix each code by itself I just wanted to know if the amount of codes here is normal lol And could there be a single thing responsible for triggering multiple codes at once?

 

No telling how long those DTC's have been in there. Clear them all out and drive it, then check them again. DTC's must be diagnosed and repaired in the order they are retrieved, starting with the first one. Then clear them out and drive it to confirm the repair. It's very possible some of them are causing others to show up.

 

I decided to start with the ABS. I cleared the codes, resoldered the control module and put everything back. I got two of the original codes back for the wheel sensors C0221 and C0222 in addition i got a third new code C0266 which i never had before.. Time for a new abs module? I cant seem to find any info on that C0266 code but im guessing it has to do with the relay(C0265)

 

C0266 - EBCM Relay Circuit
c0265 - EBCM Relay Circuit

http://www.obd-codes.com/trouble_cod...ssis-codes.php

 

exactly what did you resolder? coils? relay? power connections? more? If you have re-soldered all of these, C0266 and C0265 could also be a bad ground wire at the radiator panel. possibly an intermittent in the fuse panel or some wire in between.

 

I resoldered the relay part mainly, and i also resoldered some random parts over the board that had similar sized solder joints.
I checked the ground connection it looks all good no corrosion or anything but cleaned it up a bit regardless. After that I checked the codes and there was a 4th C0273 code. I think I either did the resoldering wrong and messed it up even more or only fixed it partially

 

I can't help beyond what I have done already. I can add that I think a poor solder joint on the black power wire (ground) at the rear of the module can act the same as a bad ground on the radiator panel. I'd resolder all of the coils and the power terminals before getting a rebuilt module. The power terminals take a lot of heat.

 

Remove module from abs pump, 4. t -15 screws clean torx holes w compressed air to prevent stripping, there are no small parts under module to loose, w a fine blade but firm tip and gently pry top till a razor can be inserted to cut sealant, DO NOT DIG DEEP INTO UNIT W SCREWDRIVER. The circuit board is really thin. Once cover is off (there will be some fight in cover,) once open solder all four input and output pins total of two each side inspect front magnet for cold solder cracks or detachment solder accordingly, in the center of board is the power relay these pins are larger and easy to spot. Solder all four w low temp solder w all 8 terminals soldered. Plug in and test, light should go out after key on self test. Use a good silicone to reseal lid on the pink dots add the same amount of silicone. Secure and you're done.