Review on Toyota 77300 53020 Fuel Tank Assembly by Daron Ellis

Check engine light (not flashing), traction control light and small green vehicle light were on all the time. Can be a sign of an air leak in the fuel system - often due to a bad fuel cap seal. First, make sure the gas cap is securely closed (make sure it clicks). It takes a while for those lights to go out. I wasn't that careful about putting the cap back on after filling up so it didn't fix the problem in my case, I think over time this broke the seal on the gas cap. Called the dealer who told me they would need to hook it up to a scan tool and that the process would cost $135 an hour which could be prorated if the problem was found quickly. I decided it was worth replacing the $20 cap first and it worked! But be careful - if the check engine light is flashing - do not drive!