2002 Cummins Codes and Dead Pedal
 

Hi everyone,
I have a 2002 24v cummins that was running fine up until a few weeks back when it started to act up.
first it was from rough idle pulsating tach all over. checked the codes PO 606,.237,and 238.

Disconnected the battery looked for wire damage and changed the map sensor. This resulted in the truck idling fine but now a dead pedal. Codes cleared also.

Changed the tps, calibrated it and all and nothing. Codes are back.

any help would be great.

BD intake, wastegate, 100hp injectors, all gauges. K&N, fass with inline filter, programmer superchip (red).

I think 2002 was the year they started using the cam sensor, maybe look there. Or the APPS under the right battery check and see what volts are.

https://www.dieselbombers.com/98-5-0...ting-apps.html

Also check the connection to the VP44 IP and if its tapped for a programmer check that connection too.:c:

i have replaced the MAP sensor it was one of the codes, and also replaced the apps. Set it to the required voltage and did a pedal reset.

Nothing.

I will be trying to look at the wire harness, I believe the truck had a programer on it that was an inline one. Also will be looking at the fuel filters while Im there.

thinking it is a bad wire.

Noticed you mentioned apps under the right battery. On the passenger side.

I have heard about a shielded grey wire on the VP plug in one thread the guy said it was discolored like it had been hot and wasn't making connection.
Also try a simple APPS reset.

Tonight after work Im going to try an apps reset again and also work through all the wires from the ecm, map, apps, and gauges.

At one point I found out that the truck had an inline power programmer. I need to find where it was spliced into the harness.

I did find all of the wiring harness diagrams on another post which should help.

Say no to Drugs hahaha

Went through the whole harness and wiggled the wire harness while running and nothing. Fuses all are fine, I had an old computer that plugged in under the dash which has been disconnected for some time.

Just disconnected batteries and going to reset the apps again.

the truck cannot find idle with my foot off the accelerator. After stepping on the gas pedal the truck idles fine.

When starting the truck I have no wait to start light. Also my temperature idiot sensor goes right to overheated.

Any other ideas.

You could have a fuse blown #17 (WTS light) or the Blk/orange wire is open from the PCM.
Check for the PCM not supplying the Cam sensor the correct 5 volts Violet/white wire at cam sensor plug.
Check the Orange wire at the map sensor also for 5 volts.
Also the PCM controls all the things you are having problems with ie: APPS,Temp,Map,WTS light.
Try unplugging the temp switch and see if the gauge still pegs,it should be a two wire plug tan/Blk and Blk/Lt blu.
let us know what you find out also check your grounds at the engine block.
The PCM is hard to get too its on the left side of the block. wiggle check that plug real good.
If the PCM is getting good Bat + voltage at pin 48 and a good ground at pin 49 the PCM may be bad.
But we can check some other things out before condemning it.

Here are some schematics from a 2001 it should be similar on your rig.
check out attachment 3 for the PCM/ECM wiring.

Attachment 30941

Attachment 30942

Attachment 30943

Have you found the problem Jason? Any updates?

Started to look at the truck last night. Under hood and cab fuse blocks are all ok. Briefly started to look at wires under hood. Hope to continue this weekend.

Im gonna condemn myself. 12 volts at the two batteries. voltage at both ecm fuses. wire Plugs into pcmecm are not numbered. Tomorrow I will be getting a ladder and looking for voltage at cam, map sensors.

Pin 48 Red/White for positive and pin 49 blk/tan for ground at the ECM.

That will be today. the plugs have a spacer plug on them and I have to get them off to be able to see which terminals are the correct wires.

Im assuming the key only needs to be on not running to test this.

If you have voltage to the cam sensor and map sensor and to the other items above it would mean that the ECM is powered up. So do these first before digging into the ECM wiring to save time.
And yes key on engine off.
If you have voltage at these items no need to check the ECM. we will then want to check the cam sensor.

Gonna head out to the old dodge and check for voltage at the various items.

I found 5 volts at the violet white wire to cam sensor which was hidden under the pump and also the map orange wire. I am going to try to reach the pcm plug under the fuel filter what a bad place to put that.

Don't worry about the PCM its working if its sending the voltage to those items. (In most cases)

I would change the cam sensor. or check the plug.
sorry i don't have the ohm out for it but you might be able to google search it.

What next?

so your thinking the cam sensor is faulty sending the wrong electrical signal back. That could also affect the dead pedal?

yes dead pedal cause there is not any speed signal for the ECM to process. And the ECM controls the VP44 fueling. Also you mentioned the tach erratic may be all cause of a bad cam sensor.
That's what I would try first wish I had the OHM readings for you on the Cam sensor we could check it. But at this point it seems likely its the problem and cheap enough its worth a try.

I found two on ebay, one has threads and one does not. the threaded one is 39 the push in is 18 dollars.

Well I guess I have to take it out. This should be an event with my oversized hands. lmao

hahahaha Did you ever figure out the temp gauge issue?

not yet, the truck has a temp gauge on the post. gonna dig under the dash as well. Also there is a three prong plug next to the pcm that has nothing plugged into it and no male deadend kinda open to the environment.

Dodge put all kinds of plugs all over that were used to interface different systems by the Dealerships.Probably just one of those would be my guess.

Anybody else got any input on this or had a similar experience just jump in and let us know :tu: 576 views Jason !!

This plug did have an old quadzilla performance system plugged in. This system was only a full performance, then switched to another programmer that allows programing from fuel economy up to performance. Flashpack. In performance you had better make sure everything is tight under the hood.

Ok, cam sensor out in only a couple minutes. Not bad at all. 8mm socket with 9" of extension.

Do you see any damage to the wire where the Quadzilla was tapped in?

No damage, the Quadzilla plugged right into the three prong female next to the pcm.

2006 dodge sprinter 2.7
 

can anyone help me? i keep getting code p0404 i found out that would be my EGR i took it off and cleaned it and put it back on but the same thing. can p0404 mean anything else ? thanks

Jason your thread has been :hijack: hahahaa

Hijacked ?

yes "Hijacked" Arthur this isn't the right place to post new problems or issues. This thread was started by Jason and only relates to Jason's truck issues.
Try here for posting new questions about your vehicle. Its ok I know the website can be difficult to navigate.
Just click on the new thread tab and add any info you want.
Dodge Truck and Cummins Turbo Diesel Forum - Diesel Bombers

Ok thanks.

Jet A Fuel

took an ohm reading and old can sensor read.98 new can sensor read .99
Installed the new one and the truck ran the same.

next approach. please