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Discussion Starter · #1 ·
Just purchased 2016 2.8 Duramax Z71 with 133,000 miles. First trip out of town yesterday, no load or trailer. Halfway up a steep grade, "reduced power" warning displayed along with check engine light. I pulled over within a mile & shut off truck for 5 minutes. Warning disappeared but check engine light stayed on. Truck seems to be running normal now. After doing ECM check, fault code P2263 "turbo boost system performance" is displayed.
Is my turbo fried? I looked under hood & noted 2 white lines on waste gate actuator & they do not line up, engine off or at idle. Could this be part of my problem?
Automotive tire Hood Motor vehicle Steering part Vehicle
 

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Just purchased 2016 2.8 Duramax Z71 with 133,000 miles. First trip out of town yesterday, no load or trailer. Halfway up a steep grade, "reduced power" warning displayed along with check engine light. I pulled over within a mile & shut off truck for 5 minutes. Warning disappeared but check engine light stayed on. Truck seems to be running normal now. After doing ECM check, fault code P2263 "turbo boost system performance" is displayed.
Is my turbo fried? I looked under hood & noted 2 white lines on waste gate actuator & they do not line up, engine off or at idle. Could this be part of my problem? View attachment 9240
I would start at the air filter and MAP sensor. More likely with that many miles the MAP is dirty/bad and causing that issue.
Let us know what you find so as to help others down the road.



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Discussion Starter · #4 ·
So here is an update:
Truck is currently at Chevy dealer. Diagnosis was faulty NOX sensor. Part is on backorder so I have no idea when truck will be ready. :(
 

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So here is an update:
Truck is currently at Chevy dealer. Diagnosis was faulty NOX sensor. Part is on backorder so I have no idea when truck will be ready. :(
Thanks so much for the follow up...
 
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