Hello,

Good to know the news! Rejoice!

I think its the tower harness connectors were the culprit. Over time the insulators have disintegrated exposing those contacts to the elements.

I have soldered all these wires together (dispensed all connectors) and heat-shrinked them. That should take them out of the equation. And because these wires don't move much (much less vibrate) I think soldering than crimping is good enough.

Check also there's a square rubber gasket within the TPS connector. Its to secure the connection (less vibration) and seal them from the elements (and prevent future issues).

I think its all about connection integrity that may have been the issue (well known to affect 740s).

One more thing about the ECU codes. They are cumulative. Old issues detected are not automatically erased once it is fixed. So its helpful to clear the codes before troubleshooting.

Regards,
Amarin.