Code P0602
 

what is it?

From the service manual: P0602 = ECM Fuelling Calibration Error which means that your ECM may have bit the big one of has some type of internal error.

but nothing is wrong, i can turn the key a few times and it didnt show but it did with the hypertech, what would that cost for a repair if it does go south?

I have no idea on a cost. I dont think this is a real common code.

Anyone else have some experience and want to take a stab at it?


Failing that, keep driving it - if it decides to take a dump on you there isnt much you can do about it.

ECM through Cummins is $1400. Had a friend have to buy one, his would not go over 1400RPMs though.

Not sure if I am going to help or confuse you more, but with the Smarty I got that all the time and it came up as a CHECK SUM ERROR. Running stock I never got it. But here is the strange thing, since the tranny work I don't get it anymore.:confused:
Also keep in mind that mine is an 05 and I never noticed anything out of the ordinary either.

https://www.dieselbombers.com/codes.php

for future reference.

This is what I can offer ya.

SYMPTOM
P0602-ECM FUELING CALIBRATION ERROR

WHEN MONITORED
Ignition ON.

SET CONDITION
If any parameter is out of range for 1 second , a DTC is stored and the MIL is illuminated.

POSSIBLE CAUSES


Specific good trip counter not equal to 0
Engine control module defective

If it keeps up looks like you will be buying a new ECM. I think Bob Wagner can get you one at a better deal though.

"Specific good trip counter not equal to 0"

what is that?

and i am heading out tommarow with a samurai on a 150 mile trip so we will see how it does

Have you cleared the code? If not, clear it and see if it comes back.