Engine/Transmission (1998.5 - 2002) P1693

[krtcummins]

What does this code refer to? Upon hot re-start my check engine light came on and the computer threw this code. Truck ran fine. Light went out after driving about fifty miles.

 

[Batphreak]

That code is called the Companion Code. It means that another module (pump controller or ECM, likely) threw a code, and that's the code the PCM throws to flag it. A full diagnostic reader is usually required to look into the other modules to find out what codes they're showing. If the light went it it means whatever condition set the code originally had some kind of timeout to it (x number of starts with no code present, for instance) and since it hit the timeout the condition could have been a fluke. Probably best to just keep an eye on it, if it happens again get it to a reader before the light goes back out.

 

[krtcummins]

I appreciate the info! Yes I had just pulled the I-70 east bound hill from Salinas, Utah to the Moab off ramp in 90 degree weather on cruise control at 70 MPH, when I pulled over to take a break. When I restarted the truck that'is when the light came on and the code poped.



I only have the basic Edge box on the truck. Maybe the ECU read too much turbo boost or something. There was no other code displayed when I checked. I was concerned big time, as that is the code it threw the last time my Vp44 went bad 50,000 miles ago. I was in a "no cell" area and in the middle of nowhere. Bad feeling!!

 

[SSolderitch]

I have a p1693 & p1694 right now and have it off and on for the past year +. Truck runs great. I just can't load my smarty. I since changed the vp44 and no changes with the codes. I have a another ecm & pcm but need a dealer vin reflash. the truck runs great so I am in no hurry. I did have a ecm problem and it was reflashed. I think that is were the problem is (bad component) .