The 2.0-liter 186-horsepower version of the 2022 Tiguan model is equipped with a particulate filter. The 2.0-liter 220-horsepower version of the 2022 Tiguan model does not have a particulate filter. A particulate filter is a ceramic filter installed in the exhaust system of diesel engines, which captures particulate emissions before they enter the atmosphere. It can reduce the soot produced by diesel engines by more than 90%, and the captured particulate emissions are subsequently burned off during vehicle operation. How the particulate filter works: The diesel particulate filter is coated with metals such as platinum, rhodium, and palladium. The black smoke containing carbon particles emitted by the diesel engine enters the exhaust particulate trap through a dedicated pipeline. The densely arranged bag filters inside capture the carbon particles on a filter made of metal fiber felt. When the accumulation of particles reaches a certain level, the burner at the end automatically ignites, burning off the captured carbon particles and converting them into harmless carbon dioxide. To check whether the 2022 Tiguan has a particulate filter, you can use the following three methods: Check the and to see if there is a particulate filter function. Additionally, you can carefully review the fault codes in the manual to see if there is a "Particulate Filter" warning light indicator. Check the label on the oil cap. If the oil cap clearly states the use of 0W-20 grade oil, it indicates the presence of a particulate filter. Look behind the catalytic converter to see if there is an additional cylindrical section on the exhaust pipe. If there is, that is the particulate filter.
