billccc

thank you so much for your information. i checked the code yesterday and also cleared the code after check, the check light is off. but i din't do anything except read the code. so i am not sure whether should i still need to clean the EGR valve, maybe the previous owner forgot clear the code. i will try to clean the EGR valve anyway. one more question is "the exhaust gas" must be hot than air, why it can lower the combustion chamber when it was conducted back to the chamber?

toysrme, thanks for replying. where is the EGR valve, how to clean it , if i don't clean it, any damge will happen? please explain a little bit more about "EGR gas temperature is too low"

hi steviej, i read the code as your instruction, it is 71, i haven't figure out what is that mean, but now the light is off again, , thank you very much.

i found one under the hood, it is small box, but it is labeled clear, i got code, thanks

hi steviej, i read the code as your instruction, it is 71, i haven't figure out what is that mean, but now the light is off again, :P, thank you very much.

i got the instruction from the website, thanks steviej, where is DLC located, and what different between DLC1, DLC2?

i have a ES250 with 130k mile, recently the check engine light is on, specially at first 3-5 mile on highway, it will go off when you drive longer , so i can't show my technician what is going on, anyone has same experience or idea what could be. many thanks.