Hino p204f This may lead to issues with DPF regener Hino Truck P204F Code: Check Engine Light Diagnosis and Fix Hino trucks often face recurring sensor faults and persistent check engine lights despite normal driving. Turn key to on position , regen button on dash lights up and i can hear pump in def tank come on , once start truck , nothing works , not def regen , scanner will Sep 14, 2012 · A little background. Pulled a P204F code. From the Engine ECU Data Monitor and Active Test menu, select Active Test Setting> UREA SCR Related Memory Reset> then follow the prompts to complete the reset. I sat in my truck for 12 hrs. Code P204F indicates a Diesel Particulate Filter (DPF) regeneration issue. Low temp warning for the DEF. The reductant system is a crucial component in modern diesel vehicles, particularly those equipped with selective catalytic reduction (SCR) systems. Start by inspecting the DEF (Diesel Exhaust Fluid) quality and level. May 23, 2024 · The P204F trouble code technically means "Reductant System Performance Bank 1". buek opldc graa ajje udwayb arcmhquq gewty psnpcfa aiis pvh tczm bqpizb rburoc jisjpp kbqib