Why Your 2012 Highlander’s MPG Crashed—and How to Diagnose It
Your 2012 Highlander’s MPG drop isn’t normal wear. A failing oxygen sensor, transmission fluid, or brake drag could be the culprit. Here’s how to diagnose and fix it.
Your 2012 Highlander’s MPG drop isn’t normal wear. A failing oxygen sensor, transmission fluid, or brake drag could be the culprit. Here’s how to diagnose and fix it.