Posted in 2nd Generation Dodge 24 Valve Powertrain

Hello all !   Recently the p0122 came on my 99 cummins, with severe driveability issues, when the throttle is pressed it revs up then dead peddles, revs up then dead peddles. I found Moparmans P0122 test and was working down the list, got to step #6 and I'm confused now if I need a ECMor an APPS.   The step is as follows "6. Check Dark Blue/ White wire for continuity between terminal no. 5 on apps harness and terminal No. 31 on ECMharness connector . If continuity does not exsist, repair Dark Blue/White wire" if continuity does exsist, replace and reprogram the ecm."   So if it doesnt have a broken wire, you need an ecm. If it has a broken wire, fix it. Then you have continuity, then you need an ecm? Something seems off here.      Thanks for any help! I hope I dont need an ECM!

My wild guess here is you need one of these 

 

And then make sure to do WT ground mod and clean all your grounds another terminals on battery etc