i have trouble code p0405 on my 98 isuzu rodeo.....that much i know. the thing is...no one can tell me what to do about it. the description of the code is EGR FLOW, SENSOR A, CIRCUIT LOW INPUT. i have called dealers and parts stores and they cant even tell me what part i need or anything. anyone have any suggestions

you need to clean the egr and egr tube. see the faqs for more info.