hello and thankyou everyone for the help i am totally lost i have a 2003 cummins 3500 ho 6 speed i was driving along getting 24 mpg motor was running great not making any noise at all stopped at gas station fueled up when i started it to leave the motor started knocking like you would not believe and i mean loud would barely run blowing white smoke so i shut it off got towed home dropped the oil no water fuel or metal part in oil!! trouble codes are p0602 p0480 p0483 p0107 and p 0073 what is goin on here?????


thanks bryan

 

P0602, PCM Programming Error
P0408, ERG Sensor B Circuit High
P0483, Fan Performance
P0107, MAP/BARO Sensor Low Input
P0073, Ambient Air Temp Circuit High Input

I'f be looking at the EGR system to start. Pull the valve and see if it is stuck open a bit. I know that killed my F550, 6.0L before.

 

it is a p 0480 not p0408 thanks for the help though how would i check to see if i have a stuck valve??

 

One sec.

 

P0480, Fan 1 Control Circuit

Might need to look at PCM fuses, relays, and wiring.

 

P0073 Ambient Temperature Sensor High
P0107 Manifold Absolute Pressure Sensor Low
P0480 Cooling Fan 1 Control Circuit/Open (Low Speed Fan Relay)
P0483 Cooling Fan Speed
P0602 Control Module Programming Error/Not Programmed

Give me a few extra minutes to find my repair/service manual.

 

all the fuses are fine ive had the computer go out before and it acts the same as it did then just has a horrible knock now sounds to me like the knock is coming off the exhaust side on the top of the motor ive read a ton of threads and it sounds like it might have a stuck valve my friends thinks a rod is bent but i dont think thats what it is how do i check for a stuck valve just take the valve cover off and have a friend bump the key while i watch the valves??



thanks bryan

 

Those codes have nothing to do with the valves.

 

okay well my main question is why is my motor making a horrible knocking noise it was running just fine i shut it off put fuel in the second i started it back up it was knocking like crazy would barely run and blowing white smoke what do i need to do to fix it im stuck driving a ford till its fixed and it just aint right