What are the reasons the 'check engine light' would come on in a 2002 Toyota RAV4?

Answer 1

I've been going through the same business for about 2 years. Check engine light usually goes on after a couple hundred miles highway driving, not around town. Last time the dealer was supposed to replace the converter but instead just recalibrated it. It's expensive and time consuming to go through this every few months. It seems to be a racket to eat money while they stall until catalytic converter is off warantee and then they can charge you $1000 to replace it. Anybody have better information or a remedy for this???? When this happened to my 2002 Rav4 I was first told that I needed to have my computer reset. $80 later I left the Toyota Dealer. 2 weeks later I was back "check engine" light on again. This time I was told the oxygen sensors were bad they would have to order me a new cat. convertor. Three days later I spent 4 hours in the waiting room while they replaced my cars cat. convertor. 3 weeks later the "check engine" light is on again. I have another appointment on Monday. I'll let you know what they say. Answer One mechanic told me that my 2002 RAV 4 needed a new O2 sensor for the check engine light on. After a new O2 sensor was installed, the RAV 4 started to shake violently, spewed black smoke and stalled frequently. Another mechanic did check-up and replaced the bad AIR-FUEL sensor. Then the car runs perfectly. The RAV 4 has only one air-fuel sensor and 4 O2 sensors.