2001 Dodge Ram 3500 5.9 Cummins no throttle pedal

I have added additional grounds from the computer case to the battery ground also taping into the ground on the throttle pigtail and grounding that to the battery as well it helps with the alternator interferences this also works when you have a torque converter lock and unlock problem it's worth a try

Try running engine with the alternator unplugged and see if problem goes away. The TPS is a high failure rate and is really hard to catch a bad one with a lab scope. The 50 pin Bosch computer on the side of the block has had ground issues. I usually tap into the two main ground wires at the PCM and pigtail another ground off that to the body. The battery cables have been known to corrode and…

Stop with the short cuts and start fixing the problems u have showing, theirs a reason ur getting all them codes, so getting bussy and start eliminating them other wise ur gonna leave some1 else with a messed up basket case of a truck, act like a mechanic otherwise find a new profession, just cause some1 else screwed up on the job dont mean u should also.

Please enlighten me on which short cuts. Ecm data is not matching actual lab scope data my understanding is that can mean bad ecm. Happy to learn different methods that’s why the question was poste.

1st of all u have several codes their that can cause those problems and the 1st thing u do is assume its wiring or alternator, u never start with the hardest till after u eliminate all the easiest and cheaper fixes, any1 that has owned or been around any gasser especially diesels knows no oil pressure no running engine why cause of the murphy switch so u dont blow it up yet many still manage 2…

Had one very similar few weeks ago on a 99 cummins. Take look at the wiring diagram, and you may find that the map/boost sensor, oil pressure sender and cam sensor all share the same 5v ref. Unplug those items, and see if your app signal stays constant and works as should. In my case, it was a shorted oil pressure switch pulling down the 5v. Check the pin fitment on those as well. Keep in mind…

Thanks for the reply. The live data is only pulled down on ecm processed data as seen on the scanner. When monitoring data on a lab scope it is not pulled down and operates within the parameters provided for the system. Can a bad 5v reference affect ecm processed data without affecting real data as seen on a scope.

The p0606 with tps problems is a common internal hardware fault in these ecu's. If you have the proper voltages from tps going into ecu but its not interpreting them correctly then I'm pretty confident its your ecu. Its such a common problem I repair on these I already know whats going on with it just from your description. If your looking to have it repaired look me up. Im in the US but I…

P0122 APPs needs to be adgusted loosen Torx and adjust until Ltblue/black tracer has .59-.65 volts/ wire should be in the 50 pin connector pin 25 also goes thru connector C125 located above the fuel filter on the firewall .

I recall Dodge ECM's (gas models come to mind, unsure about the diesels) had a self diagnostic strategy that pulled APP1's signal down to see if it showed up in APP2'. The goal was to see if the sensors were shorted between each other. It was only visible on graphed scan data, an had very rythmic pattern. Could that be what youre seeing on your scan tool?