Questions & Answers for: po420 code

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

...code po440,po420,po441, these 3 codes are the ones scanner brings up,po440,po441,po420 P0420 is catalyst system efficiency below threshold (bank 1) P0440 is evaporative emission control system ...

...code po420 I have a 2000 corolla. it had the check engine light on, and trouble code "po420". i was using unleaded fuel 89. after the check engine light was triggered, i change to premium unleaded ...

I have a diagnostic trouble codes p1768,po300,and a po420. what does this mean? I have tow of the three requested codes. po300 is misfire detected at multiple cylinders. See po301-306 represent the ...

...code po420 bank 1 in a che?vy monte what is this code po420 bank 1 in a chevy monte carlo ? How can i clear this code? I could go on and on about Po420 code but it's easyer to tell you to go to ...

code po420 on scan tool but o2 sensor was replace 2 months ago code po420 Hello and welcome. the code P0420 is for a bad cat. converter. replacing 02 sensors wont repair this code. the code simply's ...

After changing the egr and the tube, something else is causing the restriction. a more thorough diagnosis is recommended. The po420 code sounds like a possible catalyst failure or an o2 sensor failure

check engine light is on i have a 98 honda accord trying to find out what these codes are, po420,po401,p1456 Go to google & type in ---OBD2 Codes 1998 honda accord PO420 etc

...code PO420 catalyst below threshold now appearing with the engine light on. We have the plugs replaced when misfire code came. Then we had cables replaced followed by the coils. after that we had the ...

...code Pesky PO420 Codes - Eastern Catalytic www.easterncatalytic.com/education/tech-tips/pesky-p0420-codes/ One of the most annoying is the persistent PO420 diagnostic code (Catalyst System ... not ...