Toyota check light came on , scan tool help?
Okay, been doing a lot of stervice stuff these days so I bought a diagnostic scan tool for 23 dollars and found out the code was an oxygen sensor.. But before jumping the gun and buying a 100 dollar plus replacement part. I also discovered a clip wasn't locked and so the air filter case wasn't fully shut which might have triggered an os code because of vacuum leak?. so I properly closed the air filter case and erasedthe code po135 using the scan tool thereby clearing the check light on my toyota. I have also been using injection cleaner in my last two full tanks of 87 octane reg. gasoline. So far, the engine check light hasn't come on again. My question is this, if it doesn't come on again, could it have been a vacuum leak as I suspected?. or could it have been the injection cleaner I used? If the scan tool diagnotic code specified a code for an os sensor, is it just the one sensor? Tia, jon