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:
Nov 13, 2015 | 1997 Ford Explorer AWD
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
May 31, 2010 | 2001 Nissan Altima
Feb 18, 2010 | 2000 Toyota Celica
Nov 13, 2009 | 2000 Subaru Outback
Oct 20, 2009 | 2002 Jeep Grand Cherokee
516 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: