Mannol HTE - Germany 2 Pcs Pack Catalytic System Cleaner (9201)

good

a good product

I had P0420 code. Which used to come under hard acceleration and go away after 500 km if using ACEA C3 engine oil. But now, MIL remained on.I checked with OBD scanner the reading of AFR from 1st oxygen sensor and confirmed it with chatgpt that under hard revving at idle AFR should never be 29. That means due to contamination the AFR oxygen sensor was slow to react giving reading of 29. Although I was getting 46mpg at 96 kmph on highway in my Sonata 2.4 with Havoline 5w30 mixed with Liquimoly MoS2 oil additive.I put the Mannol can in 35 liter petrol.Once the engine got hot I gave it hard acceleration in 2nd gear from 4000 rpm till 6500 rpm and changed gear normally to 3rd gear till 5000 rpm. Then drove normally.I took data from OBD and found that under hard revving at idle the reading of AFR was following exactly the command from ECU well within limits.NICE CLEANING DUDE!!!

Received both bottle in very bad condition looks like are coming from trashboth bottle are Very dentedSo confused about itThinking to return it back