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j.barrett

Trying To fix this truck for months now...... engine codes.....

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So I have been trying to figure out what is really going on. I have been getting engine codes at random. the truck will be running just fine for a few days, then the check engine light will come on. it will throw a P0341, then a P1690, and sometimes a P500 I know the definition of them but I cant seem to fix the problem, I started with the Cam position sensor, replaced it, problem still occurring, but then I go back and think how it will go for a day or two without having any issues. I took my programmer out. unplugged the batteries and let them sit, hooked them back up, calibrated the APPS. but that didn't help. then I read that bad battery cables / weak batteries, and bad grounds could cause things to act up. so .............................. I bought brandnew factory battery cables, and 2 new batteries. still nothing. now I am at a total loss.. I have no idea where to go from here. Any help would be greatly appreciated.

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It goes into limp mode then comes right out of it and feels fine. This morning was driving to work no issues no lights....

Ok. Something to share with you then. I had a gent that had the very same problem with the P0341 and P1690 we went through the diagnostics as I listed above. Not was wrong. He replaced the cam sensor, the VP44, even did a custom cam sensor thinking maybe the cam was moving. (thrust plate). Needless to say it was a weak connection either at the ECM or Cam Sensor because after the dealer replaced both plugs (ECM and Cam sensor) the problem was gone. So since you have a intermittent problem like light switch it going to be a bad connection or loose wire or maybe a broken wire somewhere.
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so this evening after work I pulled the ground off the batteries, then I unplugged the cam position sensor, the map sensor and my programmer. I took compressed air to all the plugs, then some dielectric grease to the plugs (figured it would be ok ,and haven't found anything bad about doing so) and then reconnected everything. turned the key to the on position, calibrated the APPS. started the truck. then I let it warm up for a few minutes. I then drove it about 10 miles heavily on the throttle, and no lights, no limp mode no issue. so I think I have this figured out. I have my fingers crossed.

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