I have a 94 PA that I swapped out engine and trans. the sensors are all from previous engine except oil level sensor that was not on 95 lesabre. there is a640quad drive module 1 failure code I dont know where to look, I read the evap,egr,fuel system are on this quad,these are OK from 94 engine that was running 201K. The new engine had 57K, and while I was at replacing blown trans. thought I would go the mile any help on where to go next I would be grateful Thank You Pat

Disconnect the battery, disconnect the oil level sensor, reconnect the battery and see if that code will come back. Don't reconnect the oil level sensor.