p0420

[usedcartech]

Its a 2002 corolla with 130k owner states had oil changes done on regular interval [3-5k] but has not done 30/60/90/120k service. what should the cross counts be on the rear o2 as compared to front o2? Any common place fore a vacuum leak? or a exhaust leak?

Does Tsb 02804 date july 19 2004 have any application on this model?

Thanks Ron C. near Pleasant Plane Oh

[kmamaril]

Hi I had the same code. It turned out to be the cat. I posted it you can take a look.

http://www.tundrasolutions.com/forum...er/#post799209

If you search around you can get the whole cat after market for around 250 300 dollars. I think walker has a decent one. If you do decide to replace the cat yourself make sure you purchase all clamps bolts and gaskets that are on either end of the connections you will most likely have to cut clamps and bolts due to rust. Remember it is easier to buy more than what you need the first time you go to the store and return the leftovers than it is to have to make three or four trips during the project.

Good luck