Is the Three-Way Catalyst Cleaner Effective?

1 Answers
MacParker
07/30/25 12:08am
For mild three-way catalytic converter blockages, the three-way catalyst cleaner is effective. Its function is to remove sulfur, phosphorus, and other chemical substances from the surface of the three-way catalytic converter, unclog the exhaust pipe blockage, and restore the activity of the three-way catalytic converter. However, for more severe blockages, relying solely on the cleaner may not be very effective, and disassembly for cleaning may be necessary when required. If there is damage or severe blockage, direct replacement is necessary. Below are the relevant details: 1. Reason for cleaning: Due to the presence of harmful substances such as sulfur and phosphorus in fuel, chemical complexes form on the surface of the oxygen sensor and inside the three-way catalytic converter after combustion. Over time, carbon deposits form in the oxygen sensor and three-way catalytic converter. If not cleaned in time, it can lead to failures such as oxygen sensor and three-way catalytic converter poisoning and malfunction, ultimately causing abnormal engine operation, increased fuel consumption, reduced power, and excessive exhaust emissions. 2. Principle: Cleaning the three-way catalytic converter of a vehicle with a three-way catalyst cleaner requires specialized cleaning tools, similar to an intravenous drip in a hospital, hence the colloquial term 'drip cleaning' for three-way catalytic converter cleaning. The cleaning solution is drawn into the engine through the intake vacuum pipe via the tool, passes through the combustion chamber and exhaust pipe to reach the three-way catalytic converter, and undergoes a chemical reaction with the deposits on the surface of the three-way catalytic converter at a certain temperature to achieve the cleaning purpose.
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