I have a 2002 blazer, It is throwing a p0102 code. The problem is I tested the voltage on the yellow wire on the Maf with the key in the on position and it was at 5 volts I also noticed my o2 fuse was blown so I replaced it. I cleaned the Maf sen with q-tips being carefull not to hit the little things in there. Put it back on deleted the code and wammm threw it again. I tested the yellow wire still at 5 volts. Then I took it for a ride around the hood and it was hesitating at lower rpm's Drove for about 15 Min got back to the house tested the voltage and there was nothing checked the o2 fuse and it was blown tried another fuse and it also blew. I have searched on the forums for similar problems but iam stumped. Please HELP!!!!!!!

 

I think I solved the problem on the maf. The yellow wire for the maf sensor had fallen out of the wrap and melted on the valve cover. I fixed that and zipp tied the whole harness up a little bit more. As for the o2 fuse iam still lost sorry if I posted this in the wrong spot or something. I just need a little advice.

 

I would check and make sure a wire from the o2 has not melted on the exhaust... not sure if the maf and o2 are on the same circuit or not but if they are thats why the fuse blew from the maf wire being shorted out, hope this helps

 

Thanks I got the maf all fixed. I got under it and looked at all the wires coming off of the o2 sensors one looks a little krimped but none are melted that I can see. Iam gonna try and solve this tomorrow.