One problem related to service engine light on has been reported for the 2001 Toyota RAV4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Toyota RAV4 based on all problems reported for the 2001 RAV4.
5 months after purchase the service engine light came on. A dealer reset it and said it was the gas we used. Every year we go through the same thing when we purchase cheap (no-name brand) gas and had to be reset by a garage or dealer. Now we run a tank or two of better (name brand) gas and the light may go off. I know that this happens to other Toyotas.