Hi all,
I recently got 100% full dpf see dealer warning. I connected my AlfaOBD to force a regen but it would shut down after about 5 minutes due to a cat temp circuit high P0428
the graph showed the cat temp steady around 630c then a straight shot up to 999.9c and shed idle down and quit the...
hey so how did you fix your P0428 error? was it the temp sensor? or O2 sensor?
I am having the exact same issue. parked regen stops due to catalyst temp sesor reading too high. runs steady around 600c then instanly bolts to 999 and stops regen