I turned onto reduce power then looked under truck

[slavy]

P2563 Turbo Boost Control Position Sensor Circuit
P0047 Turbo/Supercharger Boost Control A Circuit Low
P0090 Fuel Pressure Regulator 1 Control Circuit Open

Ya but I don’t understand what’s causing this out of nowhere

 

[Pure Diesel]

Rodents chewing possibly???

Sent from my Pixel 6 Pro using Tapatalk

 

[1FastBrick]

It only takes 1 small rodent to climb up in there and cause you nothing but grief.

As mentioned you will need to check the wiring for each Circuit. All that stuff is probably routed close to one another near the fuel rail back near the turbo.

 

[Dozerboy]

Ya but I don’t understand what’s causing this out of nowhere

Things normally happen out of nowhere. I've never had my vehicle's assistant call me and schedule a time for it to break down. Lol
Rodents or failing wiring harnesses it's a older truck and things happen like this on brand new vehicles even.

 

[slavy]

Things normally happen out of nowhere. I've never had my vehicle's assistant call me and schedule a time for it to break down. Lol
Rodents or failing wiring harnesses it's a older truck and things happen like this on brand new vehicles even.

Is there away to bypass the limp mode to get it to mechanic?

 

[1FastBrick]

Is there away to bypass the limp mode to get it to mechanic?

No. Limp Mode by design is to allow you to get off the road if it occurs while driving.

 

[2004LB7]

Only through a tune that turns off the limp. As others have said, inspect the harness for broken wires. Especially under the fuse box.

I suggest you get it towed

 

[slavy]

I can’t get rid of this code. It has me in limp mode. Truck has been sitting. It did say clean exhaust filter now it upgraded to engine light n code p0090 and p0047. Any ideas what to do? I already have too much $$$ in this and got no clue lol

 

[TheBac]

Merged your threads as you're still dealing with the same issue. I personally would get the truck to a shop that understands Duramax engines. Members have given you plenty of ideas where to start diagnosing yourself if you are able.

 

[JoshH]

There is something wrong with the truck. Take it to someone who can diagnose and fix it. We can't do anything through a computer beyond what we have already suggested.