PCM low voltage
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Junior Member
Posts like a V-Tak
Joined: Mar 2012
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From: Las Vegas
PCM low voltage
Hello everyone, I want to said this is my first time and I need a lot of help plzs I have a 98 Sonoma 4.3L 2wd 6 cyl I have change almost every sensor before I find out the PCM it'* not sending 5 volts to the the sensors the multimeter it'* only reading 1.2 volts I try replacing the PCM with a used one I reset the passcode and it still sending only the low voltage the scanner shows a tps low voltage error, any idea of what could this be I have already spend a lot of money replacing the sensors thanks
Thread Starter
Junior Member
Posts like a V-Tak
Joined: Mar 2012
Posts: 26
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From: Las Vegas
When I connect the used pcm, even before trying to turn on the truck it had the same scanner code P0122 is it possible that the pcm i got had the same problem or the old code stay there for some reason ?
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Certified Car Nut
Joined: Jul 2003
Posts: 17,960
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From: Dark Side, AZ
Oh yea, you need to clear any all codes prior to checking for new ones. Some vehicles you can disconnect the battery and the pcm will "lose" the stored codes. Others, it keeps them.