P0605-internal Control Module Rom, PCM or TCM??

[K-Man]

Hello all, I recently got a check engine light on my 2003 KJ, p0605 code only, read on my BlueDriver scan tool. I can't find definite answers here on the forum as to whether it is the PCM or the TCM...
I have checked the ground connections on both, and reset the pins/connectors. I also have left the battery disconnected for 15 minutes and the code cleared, then code came back within minutes of driving. Trying to avoid just throwing parts at it!

Thanks for your time-
Kevin Showalter

 

[K-Man]

Hello all, I recently got a check engine light on my 2003 KJ, p0605 code only, read on my BlueDriver scan tool. I can't find definite answers here on the forum as to whether it is the PCM or the TCM...
I have checked the ground connections on both, and reset the pins/connectors. I also have left the battery disconnected for 15 minutes and the code cleared, then code came back within minutes of driving. Trying to avoid just throwing parts at it!

Thanks for your time-
Kevin Showalter

The vehicle also drives just fine!

 

[LibertyTC]

More than likely TCM ? May recommend finding a shop with a "snap on scanner" (Modis Ultra) and see if any other codes appear.
Did a relevance search, here are the listing below. Hope this helps.
https://www.jeepkj.com/search/692148/?q=p0605&o=relevance

 

[blackhawk]

See statement

 

[K-Man]

Thank you Sir!

 

[K-Man]

It was in fact the TCM. Bought a used one off eBay and CEL gone. Hopefully this helps someone in the future!!