BTT, She tossed another P0121 at me this morning... pedal never died. Might be down to adjusting or replacing (this ain't going to happen soon). This is my daily driver.

Called a half a dozen Mopar Shops and the local Cummins shop, none have a shorter lead time than at least 2 weeks (some shops said 4 weeks at best)!

Dealer - $374
Cummins shop - $360

The APPS cost roughly 1% of the retail price of the truck I paid! Albiet an important 1%, with the number of failures and non-availability of replacements somebody should have gotten a clue.

I'm sure they'd happily sell me a new rig.... but I'm afraid of Rattle Separation Anxiety.

 

Pin #21 is the one you want to check for voltage reading.

 

I gave up messing with the dumb thing and actually located a new one local to me... problem gone... but now I have the old one to tear down and see if there is anything internal that can be cleaned or whatever to restore it.