how to replace the 02 sensor


Asked by Jul 19, 2016 at 08:24 PM about the 2005 Toyota Highlander

Question type: Maintenance & Repair

Check engine light comes on.  Has been diagnosed as 02 sensor problem.

1 Answer


Its likely the HEGO (heated exhaust gas sensor) but possibly a connector or the harness its self they can be damaged from heat and or abrasion Inspect it first before just changing a sensor UNLESS it was read with the Toyota Techstream scan tool, that's a sure diagnosis of the sensor.

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