Archived what does p-done & p-e c m mean on the odometer

[CFowler]

as my lift pump died i tried to run it & the odometer flashed what i guess is a code. any one know what that means?

 

[kaffine krazed]

p-done means that is the end of the code list. Also appears if there are no codes. I'm not sure what P-ECM means I've never run into that one.

 

[CFowler]

thanks kaffine krazed. i was hoping to find out before the stealer unburries it tomorrow. we have just gotten 28 inches of snow & the plows have it socked in. drivers side & front & back are not visable . im thrilled.

 

[parcher]

P-ECM is telling you that there is a code in the engine control module. When you are reading "flash" codes you can only get info from the powertrain control module. The pcm is a Chrysler box the ecm is a Cummins box, our trucks have both.

 

[KKaiser]

So how do you check an ECM code? My truck reads the same as CFowler's.



Kent

 

[parcher]

I don't think you can without a scan tool. I may be wrong on this, I'm spoiled (have a scanner at work)

 

[CFowler]

hopefully the mechanics @ the stealership can get to work & unbury my truck tomorrow(i wouldnt want to be them suckers,unless they have a bobcat. )this sucks not havin my truck!

 

[Ben Rumson]

Autozone advertizes FREE "check engine" diagnostics. Not sure if this includes the PCM and ECM codes as well... ? Give them a call before you pay a shop to do the scan. It might save you some $$.



Also, on our old Cutlass Ciera, you could jumper two of the terminals on the scan plug (under the steering wheel) with a paperclip and then count the number of times the "check engine" light flashed to see what number was triggering the code. It would flash three times, then four times (repeated 3 times) to give a code 34. To reset the code you would disconnect the battery for a few minutes.



There might be a way to jumper two of the terminals on the PCM or ECM and read the codes accordingly... not sure here as I haven't heard anyone mention doing it on our trucks. But, this might still be possible.



Since you repalced your lift pump and triggered a code. I would disconnect both positive batter cables (and grounds) for a while and see if this resets the codes to "zero". The code may not come up again and you're good to go. If it does, THEN go get a diagnostic.



Good luck.

 

[kaffine krazed]

The trick with jumping the pins on the diag connector is pre obdII GM pre obdII and newer obdII Dodges you cycle the key from off to on 3 times ending in the on position the older cars would flash the MIL newer show the code in the odometer window.



Disconnecting the batteries doesn't clear the codes in the Cummins ECM.



I don't think there is a code in the ECM if there was there should be a code in the PCM indicating that there is a code in the other module I can't remeber what the P code is. I'm not famialer with the newer trucks in displaying the codes when the first started having them show the codes in the odometer window only PCM codes would show. From what I've read in TDR they now display PCM and ECM codes but I don't use that feature it's much easier for me to hook up a drb and have it give me a descrition of the code.



If you haven't already you might want to do a search and or post in the 24V engine and drivetrain you might get a better response there.

 

[CFowler]

well the mechanic ( if i must call him) said there was no codes stored. he said that the only thing he found was that it was a pint low of oil!! ifliped next day they replaced the lift pump.

 

[Ben Rumson]

Originally posted by CFowler

... the only thing he found was that it was a pint low of oil!!

Dang good mechanic to be able to discern a pint low out of 22 pints total. You should have told him that it's lucky you didn't burn up the engine!



Oh well. Hope you new pump fixes it.

 

[ben_ak]

The P-Code for a ECM code is P1693. That is at least one of them. I have a P-Code list from a generic OBDII scanner that showed the DC specific codes - P1693 means a code is stored in the ECM. By the way, the Key On Engine Off (KOEO) three times only works on later 1998. 5 (1998 2/3?) to current 24v trucks to the best of my understanding, not OBDII trucks (1995MY and later).