New Error Code ??

[Papa Joe]

I deleted the other short thread on this subject because it was confusing and it wasn't to the point.

My truck has 5500 miles and it runs perfectly - strong and 18 plus mpg (empty).

After startup and ten or so miles the gauges go dead (all except the speedometer). After a couple more miles all the gauges come to life and the 'engine' light comes on. It runs fine and doesn't miss a beat. If I cycle the ignition 3 times the odometer reads "P PCU" and the 'engine' light goes off. After awhile it will do this all over again.

H E L P #ad


I fear the dreaded dealership re-flash of the ECM. I don't want to lose performance or mpg. Thanks in advance. Joe

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White 2001 QuadCab 2500 Laramie SLT, HO 6-speed, 3. 54 limited slip, Mopar exhaust brake, towing/camper options, Rhino liner, Grover Air Horns (not yet installed), Un BOMBed (so far), DUAL AIR BAGS !!

 

[Bob Wagner]

Papa shoot an email to Evan

cumminsman@msn.com

you need an answer from the master mechanic #ad

 

[Papa Joe]

Can't get that e-mail address to work.
cumminsman@msn.com

Joe

 

[Bob Wagner]

so sorry its cummins_man@msn.com #ad

 

[Papa Joe]

Gosh guys, I'm looking stupid here... ...

Well, it did it again, but when I was re-fueling I had some time, so here's what happened
It posted
P PCU
-----
p 1694
-----
p 1693
-----
done
-----
5563, the mileage

now everything is fine and it doesn't happen anymore.


Do you guys want me to go away #ad
#ad
Joe

PS what is 1694 and 1693 #ad


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White 2001 QuadCab 2500 Laramie SLT, HO 6-speed, 3. 54 limited slip, Mopar exhaust brake, towing/camper options, Rhino liner, Grover Air Horns (not yet installed), Un BOMBed (so far), DUAL AIR BAGS !!

 

[Alan Reagan]

1693 indicates a fault code in the ECM and PCM.

1694 indicates a bus communication failure to the PCM.

You could try making sure the wiring harnesses are secure to the ECM and PCM. Since the indication is a bus failure that may be your problem. With that few miles, I'd let the dealer check it.

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2001 HO 6 spd 2500, 4. 10 LSD, Towing Package, Electric Brakes, SPA EGT/Boost Gauges, Fog Lights, Real Backup Lights, Molded Running Boards

 

[Papa Joe]

Thank you !!

 

[MikeR]

I'm looking through my troube code list,and I agree with Alan on checking the ECM to PCM connections.

-Mike