P0420: Catalyst System Efficiency Below Threshold (Bank 1)
Home — Free Car Maintenance Tracker
Car Maintenance Blog
Car Maintenance Cost Comparison Tool
Pricing
Fleet Maintenance Tracker
Equipment Maintenance Schedules - Mowers, Generators, Heavy Equipment
OBD-II Trouble Codes - Meaning, Causes and Fix Cost
Vehicle Maintenance Tracker
Car Maintenance Tracker
Vehicle Maintenance Log
Fleet Maintenance Tracking
Multi-Vehicle Maintenance Tracker
Contact Us
Get Started Free
Log In
How Often Should You Change Your Oil?
Honda Civic Maintenance Schedule
Toyota Corolla Maintenance Schedule
Ford F-150 Maintenance Schedule
Chevrolet Silverado Maintenance Schedule
2014 Chevrolet Silverado Maintenance Schedule
2015 Chevrolet Silverado Maintenance Schedule
2016 Chevrolet Silverado Maintenance Schedule
2017 Chevrolet Silverado Maintenance Schedule
2018 Chevrolet Silverado Maintenance Schedule
2019 Chevy Silverado 1500 LT Maintenance Schedule
Toyota Corolla Maintenance Cost by Year
Honda Civic Maintenance Cost by Year
Toyota Tacoma Maintenance Cost by Year
DIY Oil Change Guide
OEM vs Aftermarket Parts
Transmission Warning Signs
Seasonal Car Maintenance Guide
How to Track Vehicle Maintenance Schedules
How to Perform a Coolant Flush on a Ford F-150
Honda Maintenance Minder Codes Explained
Vehicle Maintenance Schedule Guide
Best Fleet Maintenance Tracker for Small Fleets
Road Trip Nutrition Guide
Oil Analysis Guide: Blackstone vs Wix vs AMSOIL vs SPEEDiagnostix
Semi Truck Oil Change Interval Guide
Shaken: Japan's Car Inspection Explained
2009 Toyota Corolla Maintenance Schedule
2010 Toyota Corolla Maintenance Schedule
2011 Toyota Corolla Maintenance Schedule
2012 Toyota Corolla Maintenance Schedule
2013 Toyota Corolla Maintenance Schedule
2014 Toyota Corolla Maintenance Schedule
2015 Toyota Corolla Maintenance Schedule
2016 Toyota Corolla Maintenance Schedule
2017 Toyota Corolla Maintenance Schedule
2018 Toyota Corolla Maintenance Schedule
2019 Toyota Corolla Maintenance Schedule
2009 Honda Civic Maintenance Schedule
2010 Honda Civic Maintenance Schedule
2011 Honda Civic Maintenance Schedule
2012 Honda Civic Maintenance Schedule
2013 Honda Civic Maintenance Schedule
2014 Honda Civic Maintenance Schedule
2015 Honda Civic Maintenance Schedule
2016 Honda Civic Maintenance Schedule
2017 Honda Civic Maintenance Schedule
2018 Honda Civic Maintenance Schedule
2019 Honda Civic Maintenance Schedule
2015 Ford F-150 Maintenance Schedule
2016 Ford F-150 Maintenance Schedule
2017 Ford F-150 Maintenance Schedule
2018 Ford F-150 Maintenance Schedule
2019 Ford F-150 Maintenance Schedule
2020 Ford F-150 Maintenance Schedule
2021 Ford F-150 Maintenance Schedule
2022 Ford F-150 Maintenance Schedule
2023 Ford F-150 Maintenance Schedule
2024 Ford F-150 Maintenance Schedule
2025 Ford F-150 Maintenance Schedule
2026 Ford F-150 Maintenance Schedule
2020 Honda Accord Maintenance Schedule
2021 Honda Accord Maintenance Schedule
2022 Honda Accord Maintenance Schedule
2023 Honda Accord Maintenance Schedule
2024 Honda Accord Maintenance Schedule
2025 Honda Accord Maintenance Schedule
2026 Honda Accord Maintenance Schedule
2020 Toyota Corolla Maintenance Schedule
2021 Toyota Corolla Maintenance Schedule
2022 Toyota Corolla Maintenance Schedule
2023 Toyota Corolla Maintenance Schedule
2024 Toyota Corolla Maintenance Schedule
2025 Toyota Corolla Maintenance Schedule
2026 Toyota Corolla Maintenance Schedule
2020 Honda Civic Maintenance Schedule
2021 Honda Civic Maintenance Schedule
2022 Honda Civic Maintenance Schedule
2023 Honda Civic Maintenance Schedule
2024 Honda Civic Maintenance Schedule
2025 Honda Civic Maintenance Schedule
2026 Honda Civic Maintenance Schedule
2020 Toyota RAV4 Maintenance Schedule
2021 Toyota RAV4 Maintenance Schedule
2022 Toyota RAV4 Maintenance Schedule
2023 Toyota RAV4 Maintenance Schedule
2024 Toyota RAV4 Maintenance Schedule
2025 Toyota RAV4 Maintenance Schedule
2026 Toyota RAV4 Maintenance Schedule
2020 Honda CR-V Maintenance Schedule
2021 Honda CR-V Maintenance Schedule
2022 Honda CR-V Maintenance Schedule
2023 Honda CR-V Maintenance Schedule
2024 Honda CR-V Maintenance Schedule
2025 Honda CR-V Maintenance Schedule
2026 Honda CR-V Maintenance Schedule
2020 Chevrolet Silverado Maintenance Schedule
2021 Chevrolet Silverado Maintenance Schedule
2022 Chevrolet Silverado Maintenance Schedule
2023 Chevrolet Silverado Maintenance Schedule
2024 Chevrolet Silverado Maintenance Schedule
2025 Chevrolet Silverado Maintenance Schedule
2026 Chevrolet Silverado Maintenance Schedule
2020 Toyota Tacoma Maintenance Schedule
2021 Toyota Tacoma Maintenance Schedule
2022 Toyota Tacoma Maintenance Schedule
2023 Toyota Tacoma Maintenance Schedule
2024 Toyota Tacoma Maintenance Schedule
2025 Toyota Tacoma Maintenance Schedule
2026 Toyota Tacoma Maintenance Schedule
True Cost to Own Calculator
Maintenance Cost Calculator
Toyota Camry vs Honda Accord: 5-Year Maintenance Cost
Toyota Corolla vs Honda Civic: 10-Year Cost to Own
Toyota Tacoma vs Tundra: 10-Year Maintenance Cost
Toyota Tacoma vs Ford Ranger: 10-Year Maintenance Cost
Chevy Silverado vs GMC Sierra: 10-Year Maintenance Cost
Honda CR-V vs Pilot: 10-Year Maintenance Cost
Toyota RAV4 vs Honda CR-V: 10-Year Cost to Own
Toyota Sienna vs Honda Odyssey: 10-Year Cost to Own
Ford F-150 vs Chevy Silverado: 10-Year Maintenance Cost
Toyota Corolla Maintenance Cost
Honda Civic Maintenance Cost
Toyota Camry Maintenance Cost
Honda Accord Maintenance Cost
Ford F-150 Maintenance Cost
Chevrolet Silverado 1500 Maintenance Cost
Toyota RAV4 Maintenance Cost
Honda CR-V Maintenance Cost
Subaru Outback Maintenance Cost
Nissan Altima Maintenance Cost
Free Maintenance Schedule Widget
Embed Widget Privacy & Trust
2015 Honda Accord Maintenance Schedule
2016 Honda Accord Maintenance Schedule
2017 Honda Accord Maintenance Schedule
2018 Honda Accord Maintenance Schedule
2019 Honda Accord Maintenance Schedule
2015 Toyota Tacoma Maintenance Schedule
2016 Toyota Tacoma Maintenance Schedule
2017 Toyota Tacoma Maintenance Schedule
2018 Toyota Tacoma Maintenance Schedule
2019 Toyota Tacoma Maintenance Schedule
Honda Accord Maintenance Schedule
Toyota Tacoma Maintenance Schedule
Camry vs Accord Maintenance Cost
Toyota Camry Maintenance Schedule
2015 Toyota Camry Maintenance Schedule
2016 Toyota Camry Maintenance Schedule
2017 Toyota Camry Maintenance Schedule
2018 Toyota Camry Maintenance Schedule
2019 Toyota Camry Maintenance Schedule
2020 Toyota Camry Maintenance Schedule
2021 Toyota Camry Maintenance Schedule
2022 Toyota Camry Maintenance Schedule
Auto Repair Cost Estimator
Synthetic Oil Change Cost Estimator
Front Brake Pad Replacement Cost
Wheel Alignment Cost
Car Battery Replacement Cost
Transmission Fluid Flush Cost
About Our Repair Cost Estimates
Ford F-150 Maintenance Cost by Year
Toyota RAV4 Maintenance Cost by Year
Toyota Camry Maintenance Cost by Year
Honda Accord Maintenance Cost by Year
Honda CR-V Maintenance Cost by Year
Seasonal Car Maintenance Guide
Why Digital Maintenance Logs Save You Money
Oil Change Intervals for 90s V8s on Short Trips
Coolant Change Interval
ServiceSage Auto vs AUTOsist
ServiceSage Auto vs Fleetio
Fleetio Alternative for Small Fleets
Privacy Policy
About ServiceSageAuto
Trusted DIY auto resources
What Car Maintenance Actually Costs
Chevrolet Silverado Maintenance Cost by Year
2003 Toyota Corolla Maintenance Schedule
2004 Toyota Corolla Maintenance Schedule
2005 Toyota Corolla Maintenance Schedule
2006 Toyota Corolla Maintenance Schedule
2007 Toyota Corolla Maintenance Schedule
2008 Toyota Corolla Maintenance Schedule
2003 Honda Civic Maintenance Schedule
2004 Honda Civic Maintenance Schedule
2005 Honda Civic Maintenance Schedule
2006 Honda Civic Maintenance Schedule
2007 Honda Civic Maintenance Schedule
2008 Honda Civic Maintenance Schedule
2011 Ford F-150 Maintenance Schedule
2012 Ford F-150 Maintenance Schedule
2013 Ford F-150 Maintenance Schedule
2014 Ford F-150 Maintenance Schedule
2023 Toyota Camry Maintenance Schedule
2024 Toyota Camry Maintenance Schedule
2025 Toyota Camry Maintenance Schedule
2026 Toyota Camry Maintenance Schedule
2020 Toyota Prius Maintenance Schedule
2021 Toyota Prius Maintenance Schedule
2022 Toyota Prius Maintenance Schedule
2023 Toyota Prius Maintenance Schedule
2024 Toyota Prius Maintenance Schedule
2025 Toyota Prius Maintenance Schedule
2026 Toyota Prius Maintenance Schedule
2020 Jeep Wrangler Maintenance Schedule
2021 Jeep Wrangler Maintenance Schedule
2022 Jeep Wrangler Maintenance Schedule
2023 Jeep Wrangler Maintenance Schedule
2024 Jeep Wrangler Maintenance Schedule
2025 Jeep Wrangler Maintenance Schedule
2026 Jeep Wrangler Maintenance Schedule
2020 Subaru Outback Maintenance Schedule
2021 Subaru Outback Maintenance Schedule
2022 Subaru Outback Maintenance Schedule
2023 Subaru Outback Maintenance Schedule
2024 Subaru Outback Maintenance Schedule
2025 Subaru Outback Maintenance Schedule
2026 Subaru Outback Maintenance Schedule
2020 RAM 1500 Maintenance Schedule
2021 RAM 1500 Maintenance Schedule
2022 RAM 1500 Maintenance Schedule
2023 RAM 1500 Maintenance Schedule
2024 RAM 1500 Maintenance Schedule
2025 RAM 1500 Maintenance Schedule
2026 RAM 1500 Maintenance Schedule
2015 Ford Escape Maintenance Schedule
2016 Ford Escape Maintenance Schedule
2017 Ford Escape Maintenance Schedule
2018 Ford Escape Maintenance Schedule
2019 Ford Escape Maintenance Schedule
2020 Ford Escape Maintenance Schedule
2021 Ford Escape Maintenance Schedule
2022 Ford Escape Maintenance Schedule
2023 Ford Escape Maintenance Schedule
2024 Ford Escape Maintenance Schedule
2025 Ford Escape Maintenance Schedule
2026 Ford Escape Maintenance Schedule
Bobcat E50 Maintenance Schedule
Bobcat E85 Maintenance Schedule
Bobcat S590 Maintenance Schedule
Bobcat T650 Compact Track Loader Maintenance Schedule
Genie GTH-636 Telehandler Maintenance Schedule
JLG 600S Maintenance Schedule
John Deere 3038E Maintenance Schedule
John Deere 318G Maintenance Schedule
John Deere 333G Maintenance Schedule
John Deere 4044M Maintenance Schedule
John Deere 5075E Maintenance Schedule
Komatsu WA380-8 Maintenance Schedule
Kubota L2501 Maintenance Schedule
Kubota L3901 Maintenance Schedule
Kubota SVL75-2 Maintenance Schedule
Polaris Ranger XP 1000 Maintenance Schedule
Polaris RZR XP 1000 Maintenance Schedule
SkyTrak 10054 Maintenance Schedule
Toro Dingo TX 525 Compact Utility Loader Maintenance Schedule
Toro TX 1000 Compact Utility Loader Maintenance Schedule
Ariens Apex 52 Maintenance Schedule
Briggs & Stratton 550EX Series Maintenance Schedule
Briggs & Stratton P2200 Maintenance Schedule
Champion Power Equipment 100296 Maintenance Schedule
DuroMax XP12000EH Maintenance Schedule
Generac GP3500iO Maintenance Schedule
Generac Guardian 24kW Home Standby Generator (Model 20 - 24 kW / 24kW WiFi Enabled 7209) Maintenance Schedule
Generac iQ3500 (7723) Maintenance Schedule
Honda GX200 Maintenance Schedule
Honda HRN216VKA Maintenance Schedule
Honda HRR216 Maintenance Schedule
Honda WX15 Maintenance Schedule
Husqvarna YTH18542 Maintenance Schedule
Husqvarna Z254 Maintenance Schedule
Kawasaki FX850V Maintenance Schedule
Kohler Command Pro CH270 Maintenance Schedule
Kohler Courage SV470 Maintenance Schedule
Kohler Courage SV590 Maintenance Schedule
Kohler Courage SV600 Maintenance Schedule
Kohler KT715 Maintenance Schedule
Kohler KT745 Maintenance Schedule
Predator 4400 Watt Inverter Generator (Item 57063) Maintenance Schedule
Toro TimeCutter 50 Zero Turn Mower (Model 75750) Maintenance Schedule
Toro TimeCutter MX5075 / 50 in. TimeCutter Max Zero Turn Mower Maintenance Schedule
Toro TimeMaster 30 inch mower (Model 21199 / 21200 / 21220 family) Maintenance Schedule
Westinghouse WGen7500 Maintenance Schedule
Westinghouse WGen9500DF Maintenance Schedule
P0420
P0430
P0300
P0301
P0302
P0303
P0304
P0171
P0174
P0172
P0128
P0442
P0455
P0456
P0401
P0011
P0016
P0740
P0700
P0135
P0141
P0113
P0217
C1201