I changed out my oil pressure sending unit last night. It didn't make the guage work, and now the truck has no power. Idles fine but can't even spin a tire on waxed ice.
Is it possible that the computer went to limp mode with the oil sensor out, or could it be the VP44?
I checked fuel pressure (15psi @ idle) and replaced the fuel filter. The lift pump has about 10k miles on it and seems okay. Acts like low fuel to injectors at low RPMs. After a few blocks I can get the boost up and then it will start to act a little more like normal. I can still get my normal amount of boost after a loooooong slow wind up. Don't think it's a turbo problem.
Codes: 0622, 1765, 0522, 1693
Any ideas??

 

Sounds like you may not have a proper connection to your oil pressure sending unit....or the unit may be bad.....and is throwing off all of the codes that you have. I would check the connection again....make sure it isnt shorting out or something like that.

here is a discription of your codes.

P0622 - Alternator Field Improper Switching

P1765 - Trans 12 Volt Supply Relay Control Circuit

P0522 -Oil Pressure Voltage Too Low

P1693 - DTC Detected In ECM Or PCM

 

Now, This May Sound Funny But Right Beside The Passenger Side Battery Is A Black 10 Ga. Wire With A Gray Clip. Make Sure This Clip Is Tight, Or The Same Result And Codes Will Occur.

 

Not what I expected, but I got to thinking after reading some of the threads here on lost power. Apparently some sensors on the engine share power circuits from the computer or share grounds. In this case the sensor sold to me by Cummins was the wrong one and it was wired differently. With the new sensor I had no engine power and no guage. With the old sensor I had full engine power and no guage. Yet with the old sensor plugged in but not screwed into the block I had no engine power and no guage. This shows me that the sensor is providing a grounding point that other sensors rely on also. Without the proper sensor screwed in and grounded to the block other sensors, possibly the TPS, could not work properly thus confusing the computer.
I put the old sensor back in and the truck runs normally again, although still without the oil guage working. I'll take it!
My head hurts

 

I guess you can see i found this thread. This has to do with what i posted in the other tread. I read on one of the dodge forums that you could get a reflash on the computer to make the newer cummins oil pressure sender work in a dodge truck, but i'm not sure if the flash was done at cummins shop or dealer. Read this about a year ago so its a little hazy.