I am having a problem with my '97 Lexus ES 300 (with 148000 miles) oxygen sensors/(as indicated by my check engine light staying on).
It started when I changed the spark plugs and soon after driving off the (Toyota) dealership my check engine light came on. I immediately went back and was told that my front two sensors have gone bad – was also told that this could happen due to the new spark plugs.
I got the front sensors from Advanced Auto Parts (Bosch Premium Oxygen Sensor) since the Lexus/Toyota ones were significantly more expensive. My Toyota dealership said that putting in the Bosch should work fine.
After, however, installing the two (left and right bank) on May 14th, the check engine light came on again. This time the Toyota dealership said that (based on the diagnostics run by them) the front sensors are not working (the ones that I changed) and they also noted this: “Exhaust Gas Recirculation Insufficient Detected”.
Now, their suggestion is that I ought to replace the Bosch sensors with Toyota/Lexus original sensors and that ought to work.
Am I missing something here or is the Toyota dealership groping in the dark in terms of what is wrong? Can I drive my car extensively with the faulty sensors?
Sorry for the rather extended script…any and all response/s will be tremendously appreciated.
Thanks and regards.