2006 Lincoln Navigator "fix code po420" Questions

CODE PO420 CHECK ENGINE LIGHT ON CODE READ PO420 most of the time its the sensor that cause this,id try replacing the sensor on it,that usually fixes that code,but you have to get the code cleared off

...fix. a po420 means that one or more of the following has happened. the easiest thing to do, is erase code with scanner. and see if it comes back. the engine coolant tempuature sensor may not be ...

CODE PO420 I LIKE TO KNOW WHO MUCH I CAN DRIVE IS TO DANGERS TO DRIVE. PLEASE CAN YOU TELL ME WHAT IS PROBLEM AND HOW LONG I CAN WAIT WI WHAT IS PO420 PO420 code has to do with the oxagen sensors, But

...PO420 NEED TO FIX SO I trouble codes PO174,PO401,PO420 NEED TO FIX SO I CAN GET IT SMOGGED IN CA. P0174 means Fuel Trim too Lean (Bank 2) P0401 means Exhaust Gas Recirculation Flow Insufficient ...

...fix this emissions problem? The inspection code given to me was PO420??? po420 is catalyst system efficiency below threshold. meaning is--- could be down stream 02 sensors or a bad convertor. try buy ...

code How do I fix kia carnival 2006 PO420 code The PO420 code is a generic code indicating a problem with the catalytic converter system efficiency below threshold. This issue can be caused by several

...want to focus your diagnosis efforts on the O2 sensors, catalytic converter, and exhaust system. Here's a great detailed article on that specific code and how to fix it - ...

...code You may have 1 bad coil not both #3 & & #7 You also have a bad exhaust converter from 10 years of on & off misfires The PO420 is (Bank 1) Passenger side Fix the misfires Replace both ...

...code came up again. When I got home I took off coil pack from cylinder 2 to inspect and found moisture coming from where the rubber boot connects to the valve head and the heat shield tube.Only ...

...code( bad converter ) and you decide not to fix it, another more serious code could be triggered and you'd never know. it could the back 02 sensor also, behind convertor. have a mechanic check it