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Tag: p0420
| # | Post Title | Date | User |
| How do I fix P0420 Catalyst System Efficiency Below Threshold | 3 years ago | grepok | |
| Elusive Ecoboost P0420 | 3 years ago | fatgroundhog | |
| Car misfire? | 3 years ago | Andy2004 | |
| Should I replace my cat | 3 years ago | ZanethC | |
| 06' Corolla with whirring noise and P0171 code | 4 years ago | sr502 | |
| stuck in open loop | 4 years ago | FlashBack | |
| 07 Lexus ES350 2 cylinder misfires and it’s only getting worse | 4 years ago | sean00 | |
| 2003 Toyota Tacoma - OBD Codes P0420, P0441, and P0446 | 4 years ago | copartconnoisseur | |
| 2006 Lexus IS250 P0420 | 4 years ago | Jasonhopkins | |
| 2004 Mazda 3 BK 1.4L multiple codes | 4 years ago | ozgurpolat | |
| Chevy Cruze 2014 Engine Code P0420 | 4 years ago | Rohan | |
| p0420 catalyst system efficiency below threshold bank 1 2004 chevy tahoe | 4 years ago | e_villa76 | |
| How do I fix trouble code P0420 | 4 years ago | Carter Olson 14 | |
| How do I fix trouble code P0420 | 4 years ago | bei_tashi | |
| How do I fix trouble code P0420 | 4 years ago | Bdog1998 | |
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