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- Sep 17, 2022
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With the messages your getting its most likely something with the DEF system. It thinks your running out or don't have any so it's reducing engine power.
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Thanks @DuraYuk I think it is something to do with emissions too. Just to be clear, it does not reduce power. The engine completly dies. It turns off. We have to pull over and restart the engine when it happens.With the messages your getting its most likely something with the DEF system. It thinks your running out or don't have any so it's reducing engine power.
Yeah I know what you mean. I'm thinking it sees no def and starts taking away power and it's shutting off. Wonder if it's a software anomaly. If TAC is involved there's really not much more you can do. They have every resource at their disposal. And when I was a tech I never had someone on the TAC line not know what they are doing.
Hi @StephenPT I only buy brand name Peak Blue DEF. I heard of others buying cheap WalMart stuff and having issues so I spend the extra $$ to avoid any quality problems. The cam shaft sensor did not sound like something easily replaced. The more they wrench on and take apart the NEW vehicle, the less we want that one back.Where do you buy your DEF? I'm in-line with DuraYuk here that it seems to be related to emissions de-rating the engine. Turning off the engine at 50% throttle output doesn't sound right though, but there could be a bit more going on.
The DEF tank has a quality sensor and will determine the opacity of the fluid. If it doesn't like what's in the tank, it will de-rate the engine and throw a code. I would first make sure you have clean DEF in the tank.
I really would like to know what made the dealership think to go after the camshaft position sensor. That is a difficult part to remove and if IIRC requires the cab to be removed. Some dealerships were replacing the cam sensor back when there was a crank-no-start issue, which was later resolved via a software update.
Ultimately, it's your rig and you can decide who works on it. I would not leave it at that dealership if they are being incompetent and not making any headway on the issue. I know it usually doesn't help to be a difficult person to deal with, but often the squeaky wheel gets the grease...