Posts Tagged: how an oxygen sensor works

Oxygen sensor — How it works

How an oxygen sensor works An oxygen sensor measures how much oxygen is left in the exhaust after combustion. The vehicle’s Engine Control Module (ECM) uses that data to recalculate how much fuel to add to each cylinder. Oxygen levels are always changing If the engine was just running with a set load and a set speed, you wouldn’t need an oxygen sensor. You could adjust the air/fuel ration to get a good burn and stay within emissions standards. The ECM uses the oxygen sensor to see how accurate it’s … Read More