Chris Turner Posted December 8, 2021 Share Posted December 8, 2021 I have STI Legacy 2006. Recently the Engine warning light has come, after engine has warmed up and traveling as speed and then run on the over run, as soon as I slow down below 40 mph or come of duel carriageway the light goes off. Car runs very well would not notice any difference in performance. have changed the Mass flow meter, and both 02 sensors pre & post, checked for vacuum leaks all seems good. Air cleaner also good. Any ideals would appreciate your thoughts. Any one know a good Subaru expert in the Guildford/Farnham area. Quote Link to comment Share on other sites More sharing options...
ernieb Posted December 9, 2021 Share Posted December 9, 2021 I think thy both relate to air flow, O2 sensor, clogged air or fuel filter. There is a stack of stuff to clear these faults if you Google the fault codes. Quote Link to comment Share on other sites More sharing options...
Chris Turner Posted December 9, 2021 Author Share Posted December 9, 2021 Ok thanks great 👍 I will check them out. Quote Link to comment Share on other sites More sharing options...
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