[kheran]

Hey guys, I've been away a while. Need some input on my son's 2017 Prime. It threw a code U3FFF (found via scanguage) and tossed on the check engine light. He did get gas a couple of days ago and we did check the cap and all was good..The car "seems" to be fine...any thoughts? It may have to go to the dealer but they are backed up for a week or so....

 

[Smart Bob]

If the car seems fine, I would record the code and then erase it. If it comes back, you have an issue, if not, it was probably just something random that can't really be explained.

 

[kheran]

Unfortunately I tried to clear it with the SGII but it wouldn't do it. I think the next course is to disconnect the battery for a bit and see how that goes.

 

[kheran]

No go on battery dis/reconnect...He'll drive it for a couple days and if it doesn't clear itself ,it's off to the creator....
We did learn one thing ....If you reset the clock in the dash display, that resets the pod clock too...How cool is that!

 

[chieftmc]

Hey guys, I've been away a while. Need some input on my son's 2017 Prime. It threw a code U3FFF (found via scanguage) and tossed on the check engine light. He did get gas a couple of days ago and we did check the cap and all was good..The car "seems" to be fine...any thoughts? It may have to go to the dealer but they are backed up for a week or so....

Code U3FFF
U codes are communication faults between the different modules present on your vehicle. The PCM has to maintain control via separate modules that monitor and control every aspect of it, from engine and emission control,transmission control, anti-lock, traction control, lighting, hvac, suspension control, etc...To diagnose these codes requires a quality scan tool and a technician who is experienced with these systems.

 

[kheran]

Code U3FFF
U codes are communication faults between the different modules present on your vehicle. The PCM has to maintain control via separate modules that monitor and control every aspect of it, from engine and emission control,transmission control, anti-lock, traction control, lighting, hvac, suspension control, etc...To diagnose these codes requires a quality scan tool and a technician who is experienced with these systems.

Thanks Mike...I thought it would be something like that ...After all this my son tells me the cruise control wasn't engaging . I'm going to make an appointment with the dealer since it is a warranty thing...