Yes I know what this code could generally mean. But If you have had this code could you please tell me specifically would the problem was for you?
I was driving home from the store today and my van started ..bucking ..and so I checked codes and Had P0622.
thanks
2002 Dodge ram van 2500

 

Ive never had the code...but these do sound right...Some common causes of code P0622 could include the following-

• Damaged, burnt, shorted, disconnected, or corroded wiring and or connectors, including damaged battery terminals
• Defective alternator
• Defective PCM. Note that unlike most other codes, a failed PCM, corrupted software, and memory errors are a relatively common cause of this code.