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Had same codes and problems they changed out clutch and module on Trans but same codes a week later so they changed out shifter nob no more problems.

Don't you have your engine washed at the truck wash? Maybe it's just a dirty ground wire. Clean it up! Get new batteries, and there might be low voltage issues.Northern trucks have lots of rust and corrosion issues in wiring. Need to pressure wash all under your truck, get all old salt and dirt out of there.

Hey Rob, you can try electronic cleaner from crc it works great on all your connectors. Ecm transmission module all that. FYI, dielectic grease is great, but in very small amounts, many people don't realize that it's non conductive. If you apply to much in connector pins, you'll actually make it worse. Its purpose is to keep it moisture out.

Nice music choice!😊

Whenever you have a laundry list of error codes it always an electrical problem. I would look for every ground connection on the truck and clean them.

I would drain the trans fluid an see what it looks like an smells like if it's smells burnt discolored from clutches etc an that's why I would not run a newer truck to much electronic stuff old school detroit 12.7 an 13 speed eaton with 3.55 gears oh also just found out gentry an sons trucking moved to a bigger shop an they r opening it up to do work on other people's stuff trucks trailers they do excellent work they haven't had any dot issues with there stuff out on the road an with the boats they haul high dollar stuff Sweetwater tn right off i75

And in the next episode of the adventures of Robert...

I don’t ever spray water under my hood n especially at a truck wash.

I think your draining your house batteries, and then they are barrowing power from your (under hood power) (ecu).

Get under the truck and look at all the connectors on the transmission. Fluid leaking into connectors, wires on sharp corners etc. clear codes and with scanner on wiggle wires. It’s not a hard failure or it would set right away after clearing it. Good luck

wash your truck

Hope you get her figured out, yall be safe....

Ya got keep the truck shiny . keep up the good work!👍🇺🇸🌟🙏

Test your batteries

Also just dont check voltage. Have load test to check amps on batteries to see if good.

I had same issue with my baler with intermittent wrong codes when bought used wouldn't run properly, can only be found at work not in shops, dealer came twice in the field and finally said only the operator can find it if he's a mechanic and yes i found a broken internal wire in a well protected area near one load sensor why ??? with an erratic false info from other load sensor, now baler works perfectly normal . Robert if truck drives normal keep driving it when it gets worse u'll find it

Important for computer to get proper voltage. I think your going in the right direction. Good luck

I have a 2018 cascadia, lights come on all the time , I don't see nothing.

Keep on trumping

I had a problem with truck going into shop every month with trouble codes. After pulling all connections and cleaning with electrical cleaner then using what is called liquid gold on all connectors, probles went away. Liquid gold helps with conductivity unlike dielectric greese.

You should stop working on your own junk.

If you read my post from a few days ago I told you what to try on these 680s I seen them do it and it Solve the problem, Raise your hood on the left side on the firewall.You got 2 plug ends there big rolls of wire push them in tighter or move them around make a better ground see if that works for you , Normally, water does it from washing your engine

my Ancel worked there is an auto link after i updated it still wont work if i put freightliner i have to do the auto link

WOBERT!?

I wish you guys were in Oregon Warren at western truck and tractor repair is the man best mechanic I have ever seen

Ya wash the truck

JBG drives Volvos many many miles and does not report any problems at all except tires,

Wiring at transmission....where ALL the road salt attacks it. Kenworth will sell you a complete wiring diagram specific to your VIN.

Why was my last comment got deleted? Do you have anything to do with it? I didn't say anything bad about trump!

Hi y'all, My honest thoughts behind what you are dealing with. You are definitely on the right track IF it is an electrical issue, which is most likely what is going on with that much shit at one time. One of the biggest things to remember when working on electrical for any vehicle these days is that they run on millivolts. All the sensors rely heavily on the ground circuit being complete and in perfect condition. So do your do yourself a favor while cleaning your wiring and dang make sure all ground connections are spotless. Look at the wire where it enters into the connectors and check for green wires (corroded wires). If they are ugly replace them. Do NOT place dielectric grease in between the wiring connections. BARE connections to each other or to mount. After connecting you can cover it with dielectric grease to aid in keeping the corrosions at bay. Do ALL grounds 1st and see if that helps. REMEMBER too really look hard at them and get rid of bad connections. USE good solder back connectors.

I don’t know how many times I’ve had stuff done at a dealership shop, it doesn’t fix the problem, and they just move on to suggesting the next repair. And nobody can answer me to explain how I’m going to be reimbursed for the repair that costs thousands that didn’t need to be done. That’s crazy to me. They wouldn’t be able to do that at a car shop.

I would drive. Yeah it's really hot 🔥 now, thinking about moving to Alaska

They don't need to take the transmission. A part all you have is a standard transmission was a clutch and personal plate was a piston on top of your transmission. That shifts it in place of you. They are a piece of s*** I have a friend that's a mechanic. He work for a multi-million dollar company. They had some trucks for them. Transmissions and them and as soon as I got in the dirt. They were brand new trucks and blow the trainee. S they're not true automatics like the Allison.

Time to check the Donuts

Kenworth's are notorious for harness issues. Sometimes where the j harness passes through the firewall.

Harness

Robert I don’t know if you know about this but when you turn your key on to start it… First turn the key to Run but don’t start it. It will give the computers time to boot up and communicate with sensors. You can hear it going through the abs system it makes that loud clicking sound by the axles. Then once it’s done communicating with all sensors start the engine up

1 the ecm can tell you and will tell you when the clutch is worn beyond limits, the clutch is just like any other clutch and is between the engine and transmission, 2 the transmission is a manual internals and air/electrically controled. 3 no way it takes 7 days to do a clutch job on these trucks, 4 j1939 is a data link, it goes to all your ecms, 8-10 of them, its the yellow/green twisted pairs, the cecu controls almost everything and is the main hub, you flip a light switch the cecu tells the light control module to turn on the light, so on and so on. 5 you need to check the water level in your batteries, apu will boil them dry in about 18 months, you will get hydrogen gas, rotten egg smell and hot batteries. 6 your issue is between the battery box front and the steer tire where it humps over the frame and the plastic tray holds the harness. 7 your issue will happen when it rains. 8 the pd harness you tried to get off and couldnt are not the harness you need to check, blow it out and and use wd40 to get it to unlock. 8 this is the only help i will give you as i am not typing all this crap again, 9 i told you what was wrong with the mack also. 20 years in a kw volvo dealer. best of luck to you.

If the batteries are a year old probably the problem. My t680 eats batteries once a year.

Be a cdl truck driver they say hahaha 😂 Then it’s diesel prices,government road pirates,insurance and maybe a dirty shower! Haha 🤣

You didnt hurt anything at all by cleaning the batteries and all them connectors. I was wondering if the couple connectors that didnt come loose , were stuck on there because of some dirt and corrosion in them?

bring it in to Canada BETTER FACTORY trained mechanics and parts in stock and cheaper labour rates . we dont have truck stops or rest areas that fix trucks just real shops

I know in my car when I get a check engine light I have it scanned. If its something like your having and everything still works i just ignore it. It goes out in a short period of time. There's a reason they call those idiot lights. Your is intermittent so its probably nothing.

I had a speed sensor that kept faulting out. Turned out it was a bad wire in the wiring harness instead of the speed sensor. With the problem your having I would say it was a short in ur wiring harness somewhere.

I would take a little transmission fluid out in a container have it tested and see if there's any metal metal Parker goes in it and put new oil in the rear end too

You definitely have a northeast truck. They use tons of salt and heavy corrosive chemicals. Great job cleaning that up.

Outstanding video, thank you for sharing, you definitely don't mind getting in there and taking care of business. Good on you both!

I don’t know

Have someone check the main computer son!

Robert, in the end my truck would lose throttle control,fail to engage in gear on demand, and throw intermittent lights. Be ready to get into the transmission. Volvo doesn't allow for repairs only replacing components. Hopefully kw allows dealers to replace worn parts. Good luck.