Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
2002 Jeep Grand Cherokee 4.0L 4WD using an Autel MX808S scanner
I did a scan and these codes came back and I can't find any info on them. Any help would be appreciated.
U302C-00
C03F1-00
Both state 'Please Refer To Service Manual'. Online search returned no helpful info.
9 minutes, 30 seconds in this video, some guy on the Youtube says Autel's bad for pre-'07 Chryslers. Does that include erroneous codes I dunno, all I own is a BlueDriver. Try a different scanner before going too deep down this rabbit hole.
Btw, Zilch, nada, on identifix, chilton, motor.com, google, youtube and iatn.