CATALYST – Catalytic Converter (DECAT)
The catalytic converter is an important component of the vehicle's exhaust emission system.
On petrol engines, the three-way catalytic converter is especially important.
The ECU can use information from oxygen sensors to monitor catalyst operation and efficiency.
For example, if a catalyst is physically damaged or blocked, changing software does not physically
repair the catalyst.
That is why proper diagnosis should always come before a software solution.