2000 Toyota Avalon Q&A
2000 Toyota Avalon Question: Check Engine Light
We took the car to the dealer for CEL, they told us it needed the bank 1 converter replaced. We also took the car to AutoZone and they gave me the printout with same info, but also showed bank 1 O2 sensor could be bad. (I have changed the sensor myself.) We had the bank 1 converter replaced at the dealer and now CEL is on again, dealer says that the computer will not tell them exactly which of the 3 converters is bad so we need to replace the other 2 for an additional $2000. I think something is fishy here!! Seems to me they should be able to troubleshoot the problem rather than just changing parts until CEL goes away because I could do that myself!! - 4Wolfman
What brand of sensor did you use, Some vehicles have a problem with aftermarket sensors so its always best to use toyota brand sensors just to make sure the universal sensor isn't giving you a false reading. - hemicuda
I am surprised at the response of your dealer. With the dealer scan tool or an oscilloscope the sensors can be monitored to see how they are reacting. Simply put the front sensor should show activity at 2500RPM and the rear should be relatively flat on a catalytic converter that is "good". Cars are getting complex but throwing parts at a car in hopes it "fixes it" is not the right route. - patrick mannion
CHECK ENGINE LIGHT STAY ON FOR ABOUT 2MONTHS AND NOW IT IS OFF. ARE THERE STILL A PROBLEM WITH MY CATALYE CONVERTER - Visitor
I had a garage replace the valve cover gasket on my '99 Toyota Avalon. The check engine light now comes on intermittantly. I took the avalon back to them, but it still comes on. What gives...
the check engine light stays on all the time
I have done a lot of research and have discovered that this particular vehicle has an electrica...
seems like everyone has the same probem as me... check engine light been on and off for two years, it's always something different...tired of spending money, now...