engine codes?

[zadam123]

I went to autozone and am getting 2 codes PO400 and PO440?

any ideas on what these might be?

also if i reset the check engine light does anyone know how many miles it resets itself if i want to get an inspection. I was told that after i reset the light a inspection machine will know and wont pass me untill a certain amount of miles have gone by without the light.

thanks
adam

[johnnyapollo]

It took my truck about a week before I could get the codes to qualify after a reset (it depends on the amount of driving you do and not the actual time) - same issue - I was pulling a code for a faulty battery and the reset disqualified me for passing the emissions test.

-- John

[zadam123]

thats what i ment , how many miles will it reset?

[zadam123]

I was told one of the codes is a egr valve, does anyoine know whrere this is located and is it easy to change myself?

[etlsport]

P0400 Exhaust Gas Recirculation Flow Malfunction
P0440 Evaporative Emission Control System Malfunction

heres a link to a list of codes http://www.obdii.com/codes.html

i dont know details about the EGR valve, but i remember a thread saying it wasnt terribly difficult to pull, but also that a lot of times you could just clean it out and it would be okay, do a search for EGR and youll probably return some good results

[zadam123]

P0400 Exhaust Gas Recirculation Flow Malfunction

anyone have any idea what this might be?