Before I get in trouble, I have read the threads about this one, especially this one:
When I do the key on-off-on-off-on, I get P1693, P DONE, and back to the trip meter/odo. I don't get separate "P PCU" and "P ECU." I do wait long enough. It never says either.
I got the code and another when I accidentally disconnected the MAP sensor with key on when I was diagnosing the broken oil pressure sender. The 1693 and MAP code came up.
I haven't had any luck clearing the P1693 with a battery disconnect or a code reader (which didn't find any other codes after I cleared the MAP code). I may not have had 40 drive cycles since then.
Maybe the ECU on the ETH engine doesn't give the "P PCU" "P ECU" messages. Any thoughts?