What causes excessive emissions o r higher-than-normal pollution levels in a Prius?

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What causes excessive emissions o r higher-than-normal pollution levels in a Prius?

While the Prius is designed for low emissions, problems like a clogged catalytic converter, dirty fuel injectors, o r a malfunctioning hybrid battery can increase emissions. Discussing preventive maintenance can help keep emissions low.

Zarnish asked on 13 Feb 2025 12:36:05 pm

1 Answer

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Car Mechanic Expert - on 13 Feb 2025 12:44:29 pm

Excessive emissions in the Prius can occur due to:

Clogged Catalytic Converter: Over time, the converter can get blocked by debris o r contaminants, causing it to lose its effectiveness at filtering pollutants.
Dirty Fuel Injectors: If the fuel injectors are clogged o r malfunctioning, they may not provide the correct fuel mixture, which leads to higher emissions.
Malfunctioning Hybrid Battery: A failing hybrid battery can cause the gasoline engine to work harder, which increases fuel consumption and emissions.

Preventive Maintenance:

Regularly check and replace fuel injectors and oxygen sensors.
Keep the hybrid battery in good condition by monitoring its health and replacing it when necessary.