Bad Oxygen Sensor- Symptoms, Causes & Troubleshooting

The oxygen sensor monitors the levels of oxygen in the exhaust gases and sends this data to the engine control unit (ECU) to adjust the air-fuel mixture for optimal performance and emissions. When the oxygen sensor fails, it can lead to various performance and efficiency problems. Here's what we'll cover: 🚗 Introduction to Oxygen Sensors: Learn about the function of the oxygen sensor and its importance in ensuring proper engine performance, fuel efficiency, and emissions control. 🔍 Common Symptoms of a Bad Oxygen Sensor: 🔧 Diagnosis and Solutions: Discover practical steps to diagnose and address issues with the oxygen sensor, such as: 💡 Causes of a Faulty Oxygen Sensor: Understand common causes of sensor failure, including contamination from oil or coolant, exhaust system leaks, and natural wear over time. 💡 Other Symptoms Mimicking a Bad Oxygen Sensor: Identify other system issues that show similar symptoms to an Oxygen sensor. 💡Common Oxygen Sensor fault codes P0130: O2 Sensor Circuit Malfunction (Bank 1, Sensor 1) P0131: O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1) P0132: O2 Sensor Circuit High Voltage (Bank 1, Sensor 1) P0133: O2 Sensor Circuit Slow Response (Bank 1, Sensor 1) P0134: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1) P0135: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1) P0136: O2 Sensor Circuit Malfunction (Bank 1, Sensor 2) P0137: O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2) P0138: O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) P0139: O2 Sensor Circuit Slow Response (Bank 1, Sensor 2) P0140: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 2) P0141: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2) P0142: O2 Sensor Circuit Malfunction (Bank 1, Sensor 3) P0143: O2 Sensor Circuit Low Voltage (Bank 1, Sensor 3) P0144: O2 Sensor Circuit High Voltage (Bank 1, Sensor 3) P0145: O2 Sensor Circuit Slow Response (Bank 1, Sensor 3) P0146: O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 3) P0147: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 3) P0150: O2 Sensor Circuit Malfunction (Bank 2, Sensor 1) P0151: O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1) P0152: O2 Sensor Circuit High Voltage (Bank 2, Sensor 1) P0153: O2 Sensor Circuit Slow Response (Bank 2, Sensor 1) P0154: O2 Sensor Circuit No Activity Detected (Bank 2, Sensor 1) P0155: O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) P0156: O2 Sensor Circuit Malfunction (Bank 2, Sensor 2) P0157: O2 Sensor Circuit Low Voltage (Bank 2, Sensor 2) P0158: O2 Sensor Circuit High Voltage (Bank 2, Sensor 2) P0159: O2 Sensor Circuit Slow Response (Bank 2, Sensor 2) P0160: O2 Sensor Circuit No Activity Detected (Bank 2, Sensor 2) P0161: O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 2) P0162: O2 Sensor Circuit Malfunction (Bank 2, Sensor 3) P0163: O2 Sensor Circuit Low Voltage (Bank 2, Sensor 3) P0164: O2 Sensor Circuit High Voltage (Bank 2, Sensor 3) P0165: O2 Sensor Circuit Slow Response (Bank 2, Sensor 3) P0166: O2 Sensor Circuit No Activity Detected (Bank 2, Sensor 3) P0167: O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 3) Chapters: 00:00 - Intro 00:17 - What is an Oxygen Sensor? 01:00 - Where is the Oxygen sensor located? 01:58 - Symptoms of a Bad Oxygen Sensor 02:06 - Symptom No. 1: Check Engine Light 02:40 - Symptom No. 2: Noticeable Loss of Fuel Efficiency 03:07 - Symptom No. 3: Strong Odors from Exhaust 03:25 - Symptom No. 4: Black Smoke from Exhaust 03:46 - Symptom No. 5: Failed Emissions Test 04:05 - Symptom No. 6: Unusual Engine Sounds 04:14 - Causes of Faulty Oxygen Sensor 04:23 - Cause No. 1: Mechanical Damage 04:38 - Cause No. 2: Carbon Buildup 04:59 - Cause No. 3: Internal Short Circuits: 05:12 - Cause No. 4: Electrical issue 05:27 - Other issues with similar symptoms of bad Oxygen Sensor 05:48 - Issue No. 1: Faulty Mass Air Flow Sensor 06:13 - Issue No. 2: Faulty Manifold Absolute Pressure Sensor 06:40 - Issue No. 3: Faulty Fuel Injectors #cardiagnostics #carrepair #symptomsofbad