Those componants would only be Can bus components as it verifys serial numbers for theft and warranty tampered items on the can bus. I have changed throttle body, cam sensors, all 4 cam solenoids and map sensor with no programming. Pcm can however record some componant disconnects also as a tamper proofing for warranty also.

 

The throttle body and MAP sensor show no requirement for a reprogram/relearn upon replacement.

So, I wonder what it is about the cam system that makes the engineers think it needs a Cam Variation Relearn procedure, when practical experience indicates otherwise. Could it be most of the time just installing the components is close enough, but not spot on?

 

I dont think it needs to reprogram or calibrate as much as just a "U" code report saved on the PCM showing what componants have been disconnected for warranty support. As normal consumers can only see P codes and dealer can see everything else. Therefore if you have a warranty issue the dealer is able to see if any componants have been tampered with or disconnected. So when dealer installs a new componant unless its recalibrated to the new componant serial number it will throw a U code of the change which only a dealer can read. But as far as the actual part it will function as normal as can be.
I could be way off mark and completely wrong but i do know for a fact some sensors report a log of disconnects and stores them for technician use.

 

Changed the sensor per the link you provided. Let it set over night with the neg battery cable unhooked, cranked and let idle for 15min.

So far all good. Thanks for the quick response.

 

Code was "P0344 camshaft position sensor intermittent - bank 1 sensor"

 

How did I know before even reading this thread that ronjenx would know the exact details of this? Nice having you around Ron.