Question about 1996 Lexus LX 450
The code reader says: P0420=catalyst system effeciency below threshold (bank 1). I would like to solve the issue without replacing the whole exhaust system, where do I start?
With that code you most likely have to replace the catalytic converter.You can try to reset the light but it will come back in time.
Posted on Nov 29, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jul 14, 2016 | Cars & Trucks
Nov 13, 2015 | 1997 Ford Explorer AWD
Oct 14, 2014 | Audi A3 Cars & Trucks
Mar 09, 2013 | Cars & Trucks
Nov 02, 2012 | Cars & Trucks
Sep 11, 2011 | 2006 Hyundai Sonata
Possible causes - Three way catalyst converter worn out
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module
Jun 07, 2011 | Mercury Cougar Cars & Trucks
518 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: