Live Data
Last reported case: 1 weeks ago
Based on 9 owner reports (6 from Reddit, 3 from forums)
What is P0420?
🚗P0420 on 2010 HONDA CR-V
This page focuses specifically on P0420 issues reported by 2010 HONDA CR-V owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2010 HONDA CR-V Owners:
p0420smoglurchingoil pressurestarter grindcodeoil leak
Parts Often Involved:
rear strutscruise control panelcatalytic convertervalvesheadlightsspark tube sealscamo2 sensortiresvtc screens
What Owners Say
Real experiences from 2010 HONDA CR-V owners
Cost Reportvia reddit_post
“Been under the car and like I said, everything unscrews like butter as needed and no leaks. 1000 mile oil consumption is 2mm on the dipstick if that. So $6000 total.”View original
Cost Reportvia reddit_post
“Update on our 2010 215k CRV EXL we paid over market for: $200 later, gremlins are gone. We paid 5800 for a 215k mile car because my elderly mother has zero patience to test drive anything and the seats must be butt height.”View original
Fixed Itvia reddit_post
“• Engine Flush for excessive oil consumption (Got lucky it fixed the stuck rings at the expense of the first catalytic converter) • VTC screens (cam and spooler)”View original
Fixed Itvia reddit_post
“• Oil filter housing gasket (Major oil leak) • Engine Flush for excessive oil consumption (Got lucky it fixed the stuck rings at the expense of the first catalytic converter)”View original
Fixed Itvia reddit_post
“I just fixed it myself for $65. P0420 is very common with Hondas and the dealers LOVE it.”View original
Fixed Itvia reddit_post
“[2010 CR-V] Dealer wanted $4000 for code P0420. I just fixed it myself for $65.”View original
Experiencevia reddit_post
“P0457 Evap emission sustem leak detected (gas cap loose/off) - already replaced gas cap but didn't fix issue, new filler neck ? P0442 Evap emission system leak detected(small leak)”View original
Experiencevia reddit_post
“P0420 Catalyst system efficiency below threshold P0457 Evap emission sustem leak detected (gas cap loose/off) - already replaced gas cap but didn't fix issue, new filler neck ?”View original
Experiencevia forum_post
“I have a 2008 Honda CR-V I bought it ~2 years ago at around 160,000 miles and it's now at ~203,000. Story: The problems started about a year ago when I was making a longer distance drive (~110 miles) down highways that got up to 80 Mph, although some points I went faster to pass.”View original
Experiencevia forum_reply
“Fortunately, the code never comes back ... I hope I could have good discussion and experience in this forum Whats the good word, I just so happened to stumble upon your post.”View original
These are real experiences shared by 2010 HONDA CR-V owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 9 discussions about P0420 from 2010 HONDA CR-V owners across automotive communities.
Success rate (33%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 1/10/2026