I have no check engine light but I read 3 codes

P603
P1000
P2285

Help help!!

 

P0603 and P1000 happen when batteries are removed, or maybe when they are failing and the voltage goes too low during cranking. By themselves those codes are not a concern.

The P2285 means your injection control pressure was low at some time. I wouldn't jump to any conclusion on that unless it becomes persistent. Reset it and see if it returns.

 

I would also get the batteries load tested. If one or both are weak they can cost you an ficm. Always replace them in pairs if you do have a weak one.

 

I replaced one with a platinum diehard but I guess I need to do the other also?

And I have reset it a few times and it comes back

 

If the other one is weak it will kill your new battery in short order not to mention the ficm.

 

The voltage for that is 48v

 

Should always replace these batteries in pairs.

Now on the ICP, if it is coming back, your next step should be to find your ICP. On an '03 it is probably under the turbo at the back of the engine. A bitch to get to, and also prone to failure back there. Find it and check for traces of oil on the sensor and wires. Bad wiring there could be the source of all 3 of those codes.

Later engines have the ICP in the passenger side valve cover.

 

It's a 12 volt battery, not 48 and a voltage reading does not constitute a load test or are you referring to ficm voltage. You need that while cranking and running.

 

For the ficm

 

When you replace spark plugs, do you do one bank? Or all of them.

Replace both batteries not just one!

If you keep getting the 2285 code, replace icp and pigtail

 

They were out of stock on the other

 

These trucks have spark plugs?

 

Just an analogy

 

Raptor doesn't miss a thing.

 

Ok so I told you what you needed to do about the p2285 on the phone sorry if my awnswer was not good enugh, however as you see the same has been said.
next the p0603 is pcm reset. either the ther batter is junk as well or its a result of disconnecting the batteries or the cts itself pulling false dtc's
p1000 is simply a code that means all moniters not run yet.
so in short icp, icp pig tail, and ignor the other to dtc's at this time.