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P200B Error Code when cold


New Member
Jan 21, 2023
Truck Year
i know this has been beat to death. But the P200B error code popped on my eco this week at 120k. Ive been GDE tuned since 70k but just purchased the MRT stage 1 tune and DEF delete in hopes of bypassing this error code. I live in Missouri where visual emissions are present so no removing egr or dpf. Anyone have any advice on gutting the DPF without cutting it open ? Also according to GDE clearing the code and driving will eventually cause regen issues hence the MRT tune and DEF delete.