This condition can be caused by condensation freezing in the muffler assembly. Follow this procedure for correction.
If an O2 sensor is not reading properly or is borderline, it should be replaced regardless of its age or mileage.
Diesel engines have a certain level of differential pressure that needs to be maintained.
Many vehicle owners may not even know if their car or truck is turbocharged.
The product data sheet starts with a listing of the basics, like appearance and part numbers.