Question Po603

[butch2000]

Hi , looking for definition of this code other then the Kam error ?thanks the voltage in my FICM drops when started . would that cause the po603 code ?

 

[snicklas]

If you FICM voltage is dropping during startup, that needs to be repaired first. It can cause all kinds of problems. Mine completely quit (12V out) and I used ficmfixer.com to get mine repaired. Just over $100 and a week and the truck was back in service again.

 

[DaveBen]

The DTC definitions are in the WIKI Technical Articles section on the TOP BLUE LINE. Look for DTC definitions under the Articles section.

Dave

 

[bismic1]

P0603 doesn't necessarily mean you have a problem, if you are runing any kind of chip, programmer ,etc. you will get that code , if you change programs or anything like that.

 

[trailey97]

if you are running a tuner, and your ficm needs replacing, i would reccommend upgrading to a 58v. they can do it to your factory one when they rebuild it. i bought one from swamps diesel for just under $700 and and only had a 2 day down time. mine also came with a 40hp tune on it.