I just bought an 03 HO 3500 (haven't changed my Sig yet) and its throwing these codes.
P0602-ECM FUELING CALIBRATION ERROR

P0580-LOW VOLTAGE DETECTED AT THE SPEED CONTROL MULTIPLEXED SWITCH
Which is probably why my cruise isn't working


P0234-TURBOCHARGER OVERBOOST CONDITION

How do I go about fixing these problems? I see velcro strips on the fuse box so someone had a programmer on it at one time.
Can I reset it or do need to have dodge look at it? Sorry for the noob questions I've only owned a first gen up till now.

 

Clear the codes with a SCAN TOOL, drive truck until they come back on..if they do. Then go from there with diag.

 

Thanks I went to Advance Auto today and had them cleared but their scan too only brought up one of the codes twice (over boost condition) the low voltage to throttle control code also went away but the 0602 (fuel calibration error) never went away and by this evening they were all back. The truck seems to be running fine, it will pull past 2700 with no hesitation but I've never driven a 2nd or 3rd gen before now so i'm not familiar with exactly how it should run or how strongly it should accelerate. Thanks for the reply and sorry if the questions seem dumb, I'm just still trying to get my bearings straight with the 3rd gen.

Clint