Wow I have had exactly the same problems ! I paid 1000$ usd they changed the oxygen sensors ! Then they found a lick on the vacuum sensor something ! The light still on with codes p0172 and p0175 and now is time for my inspection renew and I can't pass the inspection and I don't know what to do now! I have the computer so I deleted the codes but after 20 miles it comes on again ! I'm really tired of this car !! So much money ! Oh and to make it even worse I just got home from discount tire because my tire air was getting low every week I have to put air ! Well I guess the rim is crack so now I need a new rim also !!! I think just going to sell this car ! Any help anybody ? What could I do to pass the inspection ? Thank u

 

No advice, sorry. Read the 2004 Repair Manual and go to 9-165 and 9-231, there is an extensive list of tests and possible causes of your problems.

 

Weld the rim crack.. and dump Chevron in the tank.. per instructions.. cross fingers..

 

yes, if you don't educate yourself on maintenance of these cars, the dealers will bankrupt you and never be any closer to fixing it for you. They are voltage sensitive and a spike here or there, or a corroded fastener here or there will cause a fault code. So, if you can't do the maintenance or know of a good shop that can...you are kind of screwed...throw the problem out there and we will all see if we can help