Engine/Transmission (1998.5 - 2002) 0602 dtc?

[rteig]

I have had my truck throw a couple of codes here in the last week. Last weekend it was a 1682,1693, and 0602. I cleared them with the Superchips Programmer and then the 0602 showed back up again the next time I drove it. The code sheet that came with the programmer says 0602 is ECM - Fueling Calibration Error. The truck is a 2000 2500 4X4 with a 5 spd. it has 60 hp injectors, K&N FIPK, Banks High-Ram, FASS 150/150 and 4" exhaust. The VP-44 was replaced a couple of years ago. I am pulling a 25' enclosed snowmobile trailer with 2 mountain sleds in it. The programmer is set on the hi-performance and the times it did this it would have a hard time firing (I would start cranking and start applying throttle to get it to start - starts harder than normal until I clear the codes). Any ideas on what is causing this?

 

[JLandry]

Ronald,



As you noted, this is an internal error detected within the ECM. The Dodge Powertrain Diagnostic Manual directs a mechanic to reflash the ECM in attempt to correct the problem and if it returns, replace the ECM.



If this were my truck I think I'd go ahead and clear the DTC again and then reflash the ECM back to stock programming (using the Superchips Programmer) to see how it reacts. If the ECM still throws the P0602 DTC after that, I'd be looking for a replacement ECM from someplace like Auto Computer Exchange.



Good luck and please keep us posted.



John L.

 

[jhoughton]

Try checking all connections and cleaning them. Put back together with Dielectric grease, that may also be the problem.