Replacing an Oxygen Sensor: A Mechanics Guide

🔧 What does the O2 sensor do? The oxygen sensor monitors the amount of oxygen in the exhaust gases. It sends this information to the engine control unit (ECU), which uses it to adjust the air-fuel mixture going into the engine. ⸻ ⚠️ When the O2 sensor is bad: • It sends wrong data or no data to the ECU. • The ECU can’t correctly balance the air-to-fuel ratio. • The car ends up running either: • Too rich (more fuel than needed) → wastes fuel • Too lean (less fuel) → poor performance and damage r

Under the bonnet! Watch the animated video showing how an oxygen sensor in the exhaust system of a car works. | DENSO Aftermarket Europe

What Causes An Oxygen Sensor To Fail Or Go Bad? (Symptoms And Replacement Tips)

Bad O2 Sensor Symptoms - Signs of a Defective Oxygen Sensor - 1A Auto

5 Bad O2 Sensor Symptoms (Causes, Fixes & Replacement Cost)