1998 Oldsmobile 88 "codes p0420" Questions

service engine light on --intermitant---surges at slow speeds Disconnecting the battery might reset the check engine light on some cars. However, instead of doing so, I'd recommend to bring your car ...

have a 20088 fully loaded nissan quest with 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

codes.com/p0420 P0420 OBD-II Trouble Code. Technical Description. Catalyst System Efficiency Below Threshold (Bank 1). What does that mean? This diagnostic trouble code ... P0420 Code Fix How Its Done

TROUBLE 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 ...

...the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. Read more at: https://www.obd-codes.com/p0420 Copyright OBD-Codes.com ...

codes: P0420 AND P0446 1996 Oldsmobile Bravada 4.3 liter. Error 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

...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 Efficiency Below Threshold Diagnose P0420 Catalytic Coverter ...

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

2001 golf gti had fault 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 ...

...computer, and have the customer drive it and see if the code p0420 returns. 50% don't have the P420 code return. drive it and see what happens and go from there. Also FYI ...