natrlmystic

looking for instructions on how to replace my o2 se. my check engine light is on and thats the only good reason i can come up with. Also, i took out my trunk liner and have lost the plastic peg thngs to put ti back on. ANY IDEAS??

vas25tl

if you have a 96 or 97, and it is less than 150,000 miles, warranty should cover it, they do it all for free, anything that has to do with emissions

natrlmystic

i have a 97 with 90k, but just had a service done with my timimg belt at 85k. i thnk they mentined replacing the o2 sen. then from an emmisions recall. would they do it twice?

wackjum

Are you guessing about the check engine light or do you know that the 02 is bad? Is there a change in the car's behavior/feel?

Vas's suggestion is sound but it is a lot of hassle.

Sometimes the check engine light just comes on from bad gas or who knows what. Hook the car to an OBD and it will read what is stored in the car's computer. Even if it says that the CEL is on because of a slow 02 sensor, this doesn't necessarily mean it is bad. With the OBD scanner, you can delete the entry from your computer's memory.

The cheaper (for those without access to an OBD scanner) alternative is to disconnect your battery (have radio code handy if using stock headunit!) for a little while.

Once you've cleared the entry either way, pour a bottle of fuel injector cleaner into your tank, and make sure the fuel cap is tightened to three clicks. Drive the car for at least 50 miles. If the check engine light comes on again, this still doesn't mean the 02 sensor (or other costly things) are broken.

If the car is idling roughly, replace the PC valve. It's cheap and plastic and sometimes gets stuck.

dan jacobsen

You can buy an OBD II analyzer for about $150 or so (which will tell you which code you have & will let you reset the code) OR you can get auto zone to check it (& they might clear it, too) for you, no charge. You can look at the OBD II codes on numerous websites. My recommendation is to verify which CEL code you have before taking any actions. Put "check engine" into this forum's search engine and you will learn which CEL codes are most prevalent for our cars.

GOOD LUCK!!

Ken1997TL

By federal law they have to. Go get it done!

natrlmystic

thank you for all of your help. im gonna head down to auto zone now to see what they have to say!! hanks once again for all the quick replies.