Need some code help.

[96dually]

I have a 96 6.5 and I am getting codes P0183 and P0238 I can't find any info on what how to diagnose these codes any help would be greatly appreciated.

 

[ak diesel driver]

first one is fuel temp second is boost pressure

 

[96dually]

Thanks. Any clues to what would be the cause to these codes?

 

[ak diesel driver]

never seen a fuel temp code before but I have heard of fuel heaters going bad. do you have a boost gauge?

 

[96dually]

I have one but have to hook it up. What is normal boost on these engines.

 

[ak diesel driver]

Stock 5-7 is usually about max

 

[JayTheCPA]

From Google results . . .

P0183 is possibly wiring or the fuel temp sensor going bad. Do the easy part and see if there are any lose connectors.

P0238 is somewhere in the vacuum system (bad pump, bad solenoid, bad wastegate, or hose leak).

Given the combination of codes, consider focusing on the vacuum system first as the P0138 can sometimes just go-away on its own.

 

[Will L.]

I would start with clearing the codes and see if the 0183 comes back. If so check the fuel heater in the FFM is all I can think of.

 

[96dually]

Thank yall I will try these things

 

[96dually]

I would start with clearing the codes and see if the 0183 comes back. If so check the fuel heater in the FFM is all I can think of.

Yes they come back after about 45 minutes of driving