P0420
#1
Instructor
Thread Starter
P0420
Hi all,
I was scanning my car for any code with my OBD tool and I got a pending code for P0420 Catalytic converter system, Bank 1 efficiency below threshold.
I dont have any check engine light and the car drives and get great MPG. Is this sign the O2 sensor going bad? I know the Bank 2 sensor means the CAT is not working as it should and most likely the CAT is bad..
I searched the form and almost all with the code was trying to replace the Catalyic converter . The car passed smog Oct 2020 so just trying to figure out what I need to be ready for
I scanned my wife's Toyota Highlander and a friends Nissan and both had the same message so wondering if something else with the scanner or software.
Thanks
Thanks
I was scanning my car for any code with my OBD tool and I got a pending code for P0420 Catalytic converter system, Bank 1 efficiency below threshold.
I dont have any check engine light and the car drives and get great MPG. Is this sign the O2 sensor going bad? I know the Bank 2 sensor means the CAT is not working as it should and most likely the CAT is bad..
I searched the form and almost all with the code was trying to replace the Catalyic converter . The car passed smog Oct 2020 so just trying to figure out what I need to be ready for
I scanned my wife's Toyota Highlander and a friends Nissan and both had the same message so wondering if something else with the scanner or software.
Thanks
Thanks
#2
https://www.engine-codes.com/p0420_acura.html
P0420 ACURA Possible Causes
What does this mean?- Faulty Three-way Catalyst Converter Bank 1
- Exhaust Tube
- Intake Air Leaks
- Faulty Oxygen (O2) Sensor
- Faulty Fuel injector(s)
- Leaking Fuel Injector (s)
- Faulty Spark plugs
- Improper Ignition Timing
- Faulty Engine Control Module (ECM)
- Dirty Air Filter
#3
Instructor
Thread Starter
*UPDATE*
I purchased Motorkote Catalytic & Exhaust treatment after about half tank 200 plus miles The pending code for "P0420 Catalytic converter system, Bank 1 efficiency below threshold" is gone.
I read the reviews and it all had positive feedback on Amazon.
I purchased Motorkote Catalytic & Exhaust treatment after about half tank 200 plus miles The pending code for "P0420 Catalytic converter system, Bank 1 efficiency below threshold" is gone.
I read the reviews and it all had positive feedback on Amazon.
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