Questions & Answers for: p0420 code

...P0420 code, bank 1, OBD II for 2000'? Our 2000 civic (engine D16Y8) has P0420 OBD II code along with misfire on cyl 3 and 4. I changed out the plugs and the distributer cap. Can't get the rotor off ...

...code: P0420 and will not pass emissions. Also code: P0446, I realize that the P0420 may be a 02 sensor, but I am looking for anyone that may be more specific on either one of these two error codes. ...

...p0420 catylist efficiency below threshold ( p0420 ). heres a probable fix. go to http://repairpal.com/obd-code-p0420----- this will tell what may be wrong as not to replace parts that are not

...code p0420 come up had new rear lamda done still p0420 so got new front lamda, code still come up so then got a new cat, then fault code p0420 and p0120 come up,, then had new maf sencor,, still now ...

...CODE P0420 CHECK ENGINE CAME AND I HAD IT CHECKED AT AUTO ZONE THE CODE INDICATED WAS P0420. VEHICLE ISN'T MISFIRING OR RUNNING BAD. P0420 isnt a misfiring code; this code P0420 is refer at ...

...code P0420 Catalyst efficiency below ... mechanics.stackexchange.com/.../check-engine-code-p0420-catalyst-efficie... Feedback P0420 Error Code: Catalyst System Efficiency Below ... ...

...code P0420 How do I fix this problem? 0 2 sensor near the catalytic converter or replace the catalytic converter The downstream O2 sensor reading should be fairly steady. Typically the P0420 code ...

...came on my 2011 Subaru Legacy premium. I connected the computer and got three codes. P020 PRM, P0420 PND, and P0420 CNF. Can you please let me know what they are? P0420 Catalyst System

code p0420 plugs and coils have been replaced already drives fine https://www.fixdapp.com/blog/p0420 https://www.fixdapp.com/blog/p0420 https://mechanicbase.com/trouble-code/p0420 https://mechanicbase

...P0420 is a code for the catalytic converter. It has failed the efficiency test. See this post for the full story on P0420 trouble codes ...