Bad Oxygen Sensor ⏩Problems and Fail symptoms. How to fix O2 sensor and What to do? Malfunction fault code to solve. TEST Upstream and Downstream

00:00 Oxygen Sensor: What is it used for?
00:45 Illuminated Check Engine light
01:40 Decreased fuel efficiency
02:30 Gasoline smells from the exhaust
03:14 Black smoke from the exhaust
04:03 Poor motor performance
04:41 Strange pinging sounds
05:05 Rough idling
05:51 Stalling engine
06:25 Very high emissions levels
06:50 Catalytic converter failure
07:41 How often should oxygen sensor be replaced?

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