U1000 is a CAN Communication code. What is means is the communication between 1 or more control units has an open. What you need to do (if the light comes back on) is locate all the ground wires in the engine compartment and clean the terminals. All of the grounds are connected to the body or frame of the truck with 6mm (10 mm hex head) bolts. There are 2 or 3 under the air box and 2 or 3 on the right side almost in the same location. Clean the terminals and where they mount with sand paper. This should take care of your problem. If it doesn't there is a TSB for this code. The TSB is an ECM reprogram.

 

Yeah U1000 is very common in Nissan. There is a TSB on this. Like TitanTech659 stated it has to do with a bad ground. Basically they have to take your dash apart and repair the grounding wires.

 

You shouldn't have to take the dash apart. Just clean the grounds under the hood first. That usually takes care of it. If you want to clean the gounds under the dash just remove the glove box and the panel above the pedals to get to them.

 

Thanks for the replies....

I drove about 300 miles today between Houston and Lake Charles, LA and no problems. Hopefully the SES stays off and I can keep out of the dealer service dept!

Just in case...I assume this is covered under my Nissan Service Contract? I paid extra for the plan that covers the most components.

 

The bulletin for the U1000 codes provides 8 year 80,000 emissions coverage.

 

Will these grounds being dirty or not tight cause the truck to randomly shut off while driving?