Hello everyone,
I have a 2020 2500. Looking for a solution to an MIL for P0299 Turbo/Supercharger Under boost. First a little history. Around 30K miles the truck developed some drivability issues with misfires on 4 cylinders. Dealer diagnosed EGR and PCM failures and replaced the components and updated firmware. Around 50K MIL for P0299 came back. Dealer advised no problem found cleared code an again updated firmware. Truck now has nearly 80K. MIL comes and goes. Dealer has replaced top of air box, several air filters, pressure tested the system, but can not resolve the issue. I can drive the truck for hours without MIL, but once I stop for a few minutes, MIL activates within a few minutes of getting back on the road. Sometimes it comes on a few minutes after starting my day. It has also come on while climbing hills, pulling a load, and descending hills. Dealer advised FMC advised to replace turbo, been waiting 3 months for parts.
I have a 2020 2500. Looking for a solution to an MIL for P0299 Turbo/Supercharger Under boost. First a little history. Around 30K miles the truck developed some drivability issues with misfires on 4 cylinders. Dealer diagnosed EGR and PCM failures and replaced the components and updated firmware. Around 50K MIL for P0299 came back. Dealer advised no problem found cleared code an again updated firmware. Truck now has nearly 80K. MIL comes and goes. Dealer has replaced top of air box, several air filters, pressure tested the system, but can not resolve the issue. I can drive the truck for hours without MIL, but once I stop for a few minutes, MIL activates within a few minutes of getting back on the road. Sometimes it comes on a few minutes after starting my day. It has also come on while climbing hills, pulling a load, and descending hills. Dealer advised FMC advised to replace turbo, been waiting 3 months for parts.
