2001 Ecm Problems

[livewire]

Hey guys,

 

A little info: 2001 Dodge Ram 2500 extended cab 4X4, 121,000 original miles, 78,000 when i bough it.

 

Hey guys, I recently used my truck to haul my camper to Florida and it was bucking a little bit under a hard pull, it did not throw a CEL but I put my smarty on it and it threw a P0236 MAP sensor Too High Too Long, and P0602 ECM Fueling Calibration at first i thought it may the MAP sensor, as I have never changed it or had any problems with it, but then my oil gauge started acting up, it would show oil pressure and then drop to nothing and check gauges light would come on. So I changed the MAP sensor and the oil Sensor both out, and cleared the codes and they did not come back and the truck drove fine. A few days later it acted up again when my wife was driving it. Last night I hooked up to my camper, 8500lb dry weight, and pulled it about 5 miles and the truck did fine, ran great, on the way home after dropping the camper it stumbled and stuttered a couple of times. when I got home I cycled the key, and got the following codes. Still no CEL light just thought I would check it.

 

P0343 Camshaft Position Sensor Voltage Too High

P0523 Oil Pressure Voltage Too High

P0606 ECM Failure

P1286 APPS Sensor Supply Voltage Too High

P1475 Auxiliary 5 Volt Output Too High

 

I had trouble out of the truck a 1.5 years or so back, I was getting all kind of codes pertaining to the injection pump, I installed a new VP44, 75hp injectors, a Timbo Apps, a FASS fuel system, I did the W-T re-grounding modification ( I was having TC lockup issues), I checked the grounds and put a new Main ground lug on the grounds under the battery box. Did the dowel pin fix after dropping the keyway into timing cover (put in a new Front cover seal). Installed a new Cam sensor while I had the VP44 off. Truck ran great for 4-5 months then fried the ECM, it would not even start, throwing all kinds of codes in PCM and ECM. I sent off both units to Auto Computer Specialist and he repaired them while I tackled the truck, yep you guessed it, a shorted alternator. While waiting on my computers, I installed a new alternator, two new batteries, new coolant temperature sensor, I did the re-charging procedure with inline circuit breaker, added the inline fuse to the PCM circuit. Computers arrived shortly after and I installed them on the truck and it has ran flawlessly ever since.

 

I know the ECM is probably toast again, but is this a random failure or is something else going on with my truck to damage my ECM? The truck runs like a scalded Dog until it seems to get warmed up and then it starts acting up, when I first start the truck when it is cold, the voltage value on the MAP, CAM sensor and Oil pressure circuit is in range, the longer the truck runs, the higher the voltage gets until it is well over the 5 volt range.

 

Any thoughts before I send the ECM out again?

[Mopar1973Man]

Nope... The ECM crapped the bed for sure with the P0606. All other error code are result of the P0606 code. There is a solder connection or chip malfunction. 

 

Double check your AC noise from the alternator. I know you done the WT ground mod but double check your connection too.

 

Edited August 6, 2021 by Mopar1973Man

[livewire]

Do you think Auto Computer Specialist will cover it under warrenty? Its only been 11 months and 3000 miles on this ECM build?

[Mopar1973Man]

Call them and ask. What you got to lose...

[livewire]

Just got off the phone with him, he said it was good to go, one year warranty still covering it, send it back he would take care of it.

[ThomOldSchoolVet]

Thanks for the input with Auto Computer Specialist. I had a ECM installed 10 years ago. The truck has drove me out to Idaho and back to Georgia. I had it parked for the winter and was not using it that much. After a couple 32 below days it started and idled around 2000 rpm. I replaced the APP with a TIIMBO APP , disconnect the batteries and it did the same thing with the surging and high idle as if it was not reading the APPS. This is similar to what happen 10 years ago. The only codes thus far is P0622,P0122,P1693. I will send the computer to Auto Computer Specialist.