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Ecodiesel code P0428

P

Preacher79

New Member
Feb 7, 2026
1
0
Truck Year
2015
I am having code P0428 set on startup. Scan vehicle data , shows exhaust temperature at 1832 F on key on engine off at cold engine temperature. Had oxygen sensor Bank1 sensor 1 replaced because there was no activity with it until driven a mile or two . O2 sensor still doesn't have any activity until driven at least a mile after replacement .Also the data will show exhaust temp 550 to 650 after driving also . I can clear code but it resets . Any help would be appreciated
 
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