Help my ride get well please..
Aloha, I'm new to this thread and am need of guidance. Purchased a 01 Ram 2500 and didn't know what I was getting myself into. I've replaced all sensors that's on the throttle body(truck runs ) replaced trans filter and all sensors in trans. I've tried clearing my codes with a scan tool, when I start my truck and take it around the block my codes come back. Currently my truck is running in limp mode, only 2&3 shift but no O/D. Checked and rechecked all wiring connections for any breaks but found none. Could this lead me to a bad ecm? Called the dealer here in Hawaii to get ecm# they told me it's 56028550AB, but on my scan tool it's pulling up 56028550AD. Do I have the wrong ecm installed? Any help would be appreciated.. P codes are: P743 P443 P505 P753 P1765

 

P0743-Tcc circuit
P0443-Evap: purge valve circuit
P050-IAC problem.
P0753-Shift solenoid A
P1765-Trans control relay.

Couple different problems there.

The 1756 is likely the cause of ALL of your trans problems. Find out why you aren't getting 12 volts to the trans, and chances are good most of those problems will go away.

IAC code might mean a bad PCM....... Check and see if you are getting 12 volts on two wires at the IAC valve.

Welcome to DF!

 

Okay, I'll try and check when I get home from work... I'll update my post after.. TY

 

Ok update, no power going into iac harness. Checked with multimeter and nothing.. Checked and rechecked wires all is good with no breaks .. Possibly bad ecu?

 

Yep. Apparently, the drivers for the IAC have failed. Time for a new PCM.

 

will be ordering a PCM from a post I've came across on a dodge forum .. Will update when I'm done.. Thanks again!

 

May wanna check with your local parts stores.... they can get 'em faster, and if there is a problem, you can go in and talk to a real human, face to face.

 

I'll try them first, let them know what's happening and see if they can help me out!

 

well just installed another pcm that I've ordered (flashed and programmed to vehicle specs) and now it's throwing me 3 codes now.. P753 P1764 P1765.. Truck still in limp mode and I'm about to limp this beast to the grave yard 😩.

 

All those codes refer to transmission control. Need to verify you are getting power TO the trans. Do you have the service manual yet? If not, get one here.