Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I will assist you today. Besides the code, are you noticing any performance issues?
Ok, I have found a Chrysler Star case that talks about this code. I think you have a fuel/injector issue and not so much an electrical problem. Read this bulletin I found:
Vehicle Issue-P0602 Typically there is a driveability concern such as low power, hard start or no start concern, etc...;The ECM may have been recently flash updated and / or replaced.
System or ComponentDTC / Error Message;ECM
Recommendation: P0602 is generally an erroneous fault code, disregard the P0602 fault. Perform fuel system flow tests, reference TSB 14-03-06 revision A to diagnose the original engine performance problem.
Modification Date09/30/08 8:42 PM
I can also send you the TSB mentioned above.
Here is the TSB in that link below. Click on it to see it. Hopefully this helps!
Any after market items on the truck?
Okay, well if you pull up the code diagnostics, it says ECM or "flash ECM". You have replaced it 6 times, and I don't think this is an ECM at this point. I recommend performing injector flow/return tests. One of those injectors may be returning too much fuel, or you may have an injector pump/FCA issue when the engine temperature gets up there. Time to check the fuel system next.
Just thinking "outside the box" so to speak. Knowing that makes me think that it is not electrical.
Sounds good. I think that is the best move. Ignore the code for now and treat this like a performance issue with no codes.
You are very welcome and thank you for the positive rating! I will keep this post open for a few weeks just in case you have any follow up questions.
That would make sense. Does it do that with the other ECM's?
And you have replaced the engine harness correct?
Have you tried swapping the CP3 pump yet?
True. Tell me if you disconnect the connector at the FCA while the rail pressure starts to drop, will the pressure come back up?