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PCM 1 fuse


oldkckr41
08-11-2009, 03:51 PM
2004 tahoe I keep blowing pcm 1 fuses I would like to think it isn't the fuel pump. only code is a PO141 Ox sensor bank n1 sensor 2 could this blow the pcm 1 fuse it doesn't blow immediately :banghead:

TheBobsHere
08-11-2009, 03:59 PM
Any sensor or wire with a dead short can blow PCM fuses or trip breakers. A bad PCM could to.

ronaldk
08-11-2009, 05:08 PM
I have to agree with bob, its a short. the pcm 1 fuse does power 02s so pcm is coding 02. poss wire there has pulled out or burned off of 02. let us know good luck

oldkckr41
08-11-2009, 07:43 PM
Thanks I will keep you posted

oldkckr41
08-11-2009, 09:26 PM
I found it The wire harness that goes to the left side oxygen sensor fell out of its hold down and into the drive shaft severing two wires in half. now to find a harness I don't think it is a good Idea to try to mind thanks agian for the help.:)

j cAT
08-11-2009, 10:00 PM
I found it The wire harness that goes to the left side oxygen sensor fell out of its hold down and into the drive shaft severing two wires in half. now to find a harness I don't think it is a good Idea to try to mind thanks agian for the help.:)

if the wire in the vehicle harness is broken splice a new wire to replace...use solder and heat shrink insulation...

the O2 sensor wires attached to the o2 sensor are not to be repaired..though..

ronaldk
08-11-2009, 10:57 PM
Glad it worked out for you thanks for posting back.

MT-2500
08-12-2009, 09:39 AM
2004 tahoe I keep blowing pcm 1 fuses I would like to think it isn't the fuel pump. only code is a PO141 Ox sensor bank n1 sensor 2 could this blow the pcm 1 fuse it doesn't blow immediately :banghead:

What engine?

Best to get a wiring diagram for you engine and VCM and check all circuits that are on that fuse.
How often does it blow fuse?
Check all wiring real close and run a amp draw on fuel pump and other circuits on that fuse.
Some times you have to unplug one circuit at a time to find which one.
Let us know how it goes.

oldkckr41
08-13-2009, 05:28 PM
I replaced the missing section of wire with some 18 Ga., soldered and shrink tubed the sections ,replaced the wires back in the harness, taped and wire tied it back in place. The code went away, and seems to be working. Thanks again. :smokin:

j cAT
08-13-2009, 06:03 PM
I replaced the missing section of wire with some 18 Ga., soldered and shrink tubed the sections ,replaced the wires back in the harness, taped and wire tied it back in place. The code went away, and seems to be working. Thanks again. :smokin:

thats better than any repair shop would do...good luck..

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