Question about 2003 Toyota Avalon
The check engine light is triggered by trouble codes which means something is wrong with the emmissions systen, transmission, motor sensors etc. A dirty oil filter will not trigger a code. You need to scan the car with an OBDII scanner to get the codes. Once oyu have the codes post them here and we can help you. If you don't have a scanner you can take the car to your local auto parts store, they'll scan for free and give you the codes.
Posted on Jul 03, 2010
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Posted on Jan 02, 2017
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