Petrol Particulate Filter (GPF/OPF) Deactivation

Diesel cars have had particulate filters for years, and now petrol cars are also being fitted with them to reduce pollution. The GPF, made of a synthetic ceramic material that looks like a honeycomb, is placed within the exhaust system to capture particulates produced by the engine. As the filter relies on heat to work effectively, it is usually located near the engine block. Once the particulates enter the filter, they are burned off at a high temperature, reducing them to small amounts of carbon dioxide, water, and nitrogen. However, there are situations where it may be necessary to disable the filter in the engine control unit, for example, to identify the exact cause of a vehicle malfunction and eliminate other potential causes.