Fixing P0420
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- Posts: 2
- Joined: Mon Mar 07, 2022 9:40 pm
Fixing P0420
Hi, I have problem with my Honda Vezel 1.5RS CVT coded as P0420. It has been diagnosed by a car mechanic as Catalyst System Efficiency Below Threshold. This car is a parallel imported car. Does someone here know where I could fix this problem.