dodge caravan code p1607

[Brett Hartwig]

so further update from a previous question. I looked up the "key dancing" idea and tried it on my dodge grand caravan. The code that showed up on the dash was P1607, a quick google search says its "pcm internal failure". Perhaps the battery is getting low? Would that cause it? Going to look on some Dodge forums as well

 

[scott degroot]

I have never seen a weak battery cause this but it is possible. If you verify the battery condition as being good then you have to check for good power and ground at the pcm itself. If that checks out then you need to replace the pcm.