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What Does Reduced Engine Performance Mean?

2 Answers

FrankAnn

07/23/25 11:46pm

Reduced engine performance refers to some manifestations of decreased performance in the engine when the vehicle owner operates it improperly, and the vehicle will display this warning. This condition may be caused by issues with the engine's turbocharger or the quality of the fuel used by the owner. It is recommended to take the vehicle to a 4S shop for inspection and repair. Below is some relevant information about car engine maintenance: 1. Regularly change the engine oil and filter: After a certain mileage, the oil filter works to remove dirt and metal particles from the oil. Over time, the filter paper can become clogged, hindering oil circulation and affecting the engine's normal operation. Additionally, the harsh working conditions (high temperature, high pressure) of the engine accelerate the oxidation of the oil. 2. Use qualified coolant: The car engine relies on the radiator to cool down, which is crucial. Otherwise, the engine may "overheat," causing fatal damage. Therefore, it is essential to ensure that the coolant in the radiator is maintained at the proper level.

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DeZachary

08/10/25 7:37pm

If you see the dashboard displaying 'Reduced Engine Performance' while driving, it essentially means the car has detected some issues with the engine and promptly reduced output to prevent catastrophic failure. This mechanism is common in modern vehicle protection systems—for instance, when sensors like the oxygen sensor or mass airflow sensor malfunction, they provide incorrect air intake or fuel supply data, triggering automatic throttle limitation. This results in sluggish acceleration, as if the car were a snail climbing a hill. I've experienced this firsthand: a normally smooth-driving car suddenly loses power when you hit the gas, especially dangerous during overtaking due to insufficient power increasing accident risks. Common culprits include a dirty air filter, low fuel pressure, or poor electrical connections. It's crucial to visit a professional shop immediately to read fault codes and fix the issue. Ignoring it leads to worsened fuel efficiency, rough idling, or even engine seizure requiring costly replacement. For safety, avoid high-speed driving once this warning appears.

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