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Will the engine malfunction light come on if the oxygen sensor is broken?

1 Answers

BellaAnn

07/30/25 8:47am

If the oxygen sensor is damaged, the engine malfunction light will illuminate. The oxygen sensor is one of the critical sensors in the engine control system, and its malfunction can affect the normal operation of the engine. Below is additional information about the oxygen sensor: 1. The oxygen sensor detects the oxygen concentration in the exhaust and sends feedback signals to the ECU, which then adjusts the fuel injection volume. 2. The sensor measures whether there is excess oxygen in the exhaust after engine combustion and converts the oxygen content into a voltage signal transmitted to the engine computer. 3. The oxygen sensor consists of a porous ZrO2 ceramic tube as its core element, which is a solid electrolyte, with porous platinum (Pt) electrodes sintered on both sides. 4. The principle of the oxygen sensor involves using a ceramic sensitive element to measure the oxygen potential in the vehicle's exhaust pipe, calculating the corresponding oxygen concentration based on chemical equilibrium principles to monitor and control the air-fuel ratio of combustion.

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