Yes, I follow the directions with regard to the sequence of training. I've always received the confirming "chirp" before moving on to the next sensor, so I know that's been done correctly. Curiously though, I can't get a chirp from the two aftermarket replacements that were just installed. I'll try stronger magnets when I get a chance.

 

Sounds like your problem.

 

This is sort of the answer I expected to hear. Our Pac is a early model like yours and when I found it has the early sensors I asked the guy at NAPA parts about the batts condition in the new sensor and he said if it doesn't work to bring it back for replacement. Sensor was about $64. *BW*