In the past the check engine light would go on after getting gas. When I had a small shop mechanic he would just turn the light off and not charge me. Now I go to a toyota dealership for lof and they want $120 to diagnose why light is on. Any helpful advice would be appreciated. I'm a 64 year old female and I don't want to do repairs myself; my brother tells me he bought a checker for $40 and uses it himself. Thanks for any help.
 
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