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What Causes Engine Shaking When the Front Oxygen Sensor Fails?

1 Answers

KendraDella

07/29/25 6:07pm

The causes of engine shaking when the front oxygen sensor fails are: 1. Poor fuel quality; 2. Faulty spark plugs; 3. Damaged catalytic converter. The impacts of a faulty front oxygen sensor include: 1. Excessive exhaust emissions; 2. Deterioration of engine performance; 3. Engine stalling at idle; 4. Inaccurate engine operation and reduced power; 5. The engine control unit (ECU) being unable to accurately assess the air-fuel mixture condition; 6. Disruption of the catalytic converter's normal operation. The front oxygen sensor is a critical feedback sensor in the electronic fuel injection control system, playing a key role in managing vehicle exhaust emissions, reducing environmental pollution, and improving fuel combustion efficiency in the engine. It is installed on the engine's exhaust pipe.

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Can Poor Quality Fuel Cause the Engine Light to Illuminate?

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What Causes the Exhaust System Warning Light to Illuminate?

Here are the reasons and solutions for the illumination of the engine exhaust system warning light: 1. Oxygen sensor failure: The illumination of the engine exhaust system warning light is mostly caused by damage to the oxygen sensor in the three-way catalytic converter system or poisoning of the catalytic converter due to poor fuel quality in the domestic market. If this light comes on while driving, immediately reduce speed and proceed to the nearest service station for inspection. 2. Fuel pump or ignition system failure: If the vehicle stalls and cannot restart after the warning light comes on, this is usually due to a fuel pump or ignition system malfunction. If the vehicle can still be driven but exhibits severe shaking, lack of acceleration power, or similar symptoms, it is advisable to stop driving. This not only prevents further damage to the engine but also ensures personal safety.

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