Sorry it's been a while haven't been able todo anything with the truck till this week, so the fuel pressure is good right about 55 with KOEO, I pulled the codes and these are what showed,117-ect sensor signal voltage too low,122- tp sensor voltage to low, 126- map or bp signal values higher or lower than expected,112- act sensor voltage to low, 327- eve,pfe, or pet signal voltage to low,513- eca problem internal voltage test fail,553-tad or am2, solenoid circuit fail, 552 tab or am1 solenoid circuit fail,556 fuel pump relay primary circuit fail,558- evr solenoid circuit fail,565 canister purge solenoid circuit fail, so where should I start ? Would a bad pcm cause these ? Seems like quite a few things aren't getting the voltage they need. Any insight is greatly appreciated

 

Most of them are low voltage... I'd start by cleaning the battery terminals, same with all the grounds you can find, especially the ground wire coming off the negative batt. terminal.

 

Right on. X2 and all that stuff. I bet ya got some bad grounds. Is the wiring
chopped up from amateur radio or other accessories being installed? If so
I would go pull harnesses at a pick and pull. And while changing them out
super clean all connections. Dielectric grease is your friend. My $0.02

 

Terminals and battery are new, I'll check the grounds, as far as wiring being chopped up where would I be looking, it does have a CD player installed and I don't know who put it in or their skill level but If I had to guess I'd say amateur, is the wiring harness your referring to go to the radio ? Just checked ground off neg. battery terminal and it looks good.

 

So I was looking at another set of code definitions and the513 code said Pcm Internal voltage fail replace processor, if the pcm had a voltage fail would it make all the other sensors show low voltage?