In this video, you will learn the warning signs of a failing or faulty oxygen sensor in your car. This automotive repair video covers:

What an oxygen sensor does and why it's important for engine performance
The 6 common symptoms of a bad oxygen sensor:
1. Poor fuel economy
2. Rough idle
3. Hesitation and lack of power
4. Failed emissions test
5. "Rotten egg" smell from exhaust
6. Flashing check engine light

Potential causes leading to oxygen sensor failure:
Age and high mileage
Oil contamination
Leaded gasoline or fuel additives
Electrical damage
Excessive exhaust heat

How to diagnose a faulty oxygen sensor:
Scan for diagnostic trouble codes related to oxygen sensors
Use a multimeter to check sensor signal voltage
Monitor in realtime with a live data scanner
Before replacing your oxygen sensor, check for exhaust leaks that could impact readings. Often, the most costeffective solution is to replace the oxygen sensor.

For a more detailed checklist on diagnosing this issue, read our recent blog post here:
https://www.autocornerd.com/caridles...

#oxygensensor #checkenginelight #OBD2

Timecode:
00:00:00 Introduction
00:00:04 Recognizing a bad oxygen sensor
00:00:08 Function of an oxygen sensor
00:00:12 Types of oxygen sensors
00:00:18 Focus on the upstream sensor
00:00:22 Importance of the airfuel ratio
00:00:26 Sensor contamination
00:00:31 Rich or lean airfuel mixture
00:00:36 Key symptoms of a bad sensor
00:00:41 Symptom 1: Poor Fuel Economy
00:00:50 Symptom 2: Rough Idle
00:01:23 Symptom 3: Hesitation or Lack of Power
00:01:46 Symptom 4: Failed Emissions Test
00:02:22 Symptom 5: "Rotten Egg" Smell
00:02:54 Symptom 6: Flashing Check Engine Light
00:03:11 Causes of sensor failure
00:03:38 Cause 1: Age and Mileage
00:03:47 Cause 2: Oil Contamination
00:03:55 Cause 3: Leaded Gasoline and Fuel Additives
00:04:01 Cause 4: Electrical Damage
00:04:06 Cause 5: Excessive Exhaust Heat
00:04:20 Diagnosing a faulty sensor
00:04:24 Using an OBD2 Scanner
00:04:32 Measuring signal voltage
00:04:50 Live data scanner
00:04:54 Exhaust leaks
00:05:00 Cleaning vs. Replacing the sensor
00:05:04 Cleaning limitations
00:05:19 Replacement recommendation
00:05:27 Conclusion and recommendations
00:05:32 Outro and additional resources