OBDII says P420, O2 Sensor

IF YOU HAVE QUESTIONS OR ISSUES WITH ANYTHING RELATED TO OBD-1 AND OBD-2, SECURITY, AUDIO AND VIDEO SYSTEMS, PLACE THEM HERE. USE THIS FORUM FOR SES LIGHTS, RPO CODES, FACTORY OPTIONS ETC.
Post Reply
User avatar

Topic author
LaGrasta
I sleep in my van
I sleep in my van
Posts: 724
Joined: Fri Jan 19, 2007 2:07 pm
Location: Mission Viejo, CA

Re: OBDII says P420, O2 Sensor

Post by LaGrasta »

Well, I ran it again and no more code P420. I guess it too needed a bunch of time (cycles) to clear itself. Over a 1000 miles!

I'll consider this case closed, thanks for your help and advice.

And Merry Christmas!
1998 Astro, 246,000 miles

K&N air filter
TruCool trans cooler
2" Overland lift & 15" BFG Terrain, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Gabriel Ultra shocks, rear AirLift bags & sway bar
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box
Top

LiftedAWDAstro
I have my van tatooed on my cheeks
I have my van tatooed on my cheeks
Posts: 4379
Joined: Sat Sep 09, 2006 3:35 pm
Location: New Haven, NY

Re: OBDII says P420, O2 Sensor

Post by LiftedAWDAstro »

Congrats! Hopefully it stays that way!
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

Mileage spreadsheet

Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy
Top

Astrophysics
I sleep in my van
I sleep in my van
Posts: 974
Joined: Sat Jan 12, 2008 9:23 pm

Re: OBDII says P420, O2 Sensor

Post by Astrophysics »

Went up steep hill in So Cal Tahacapi mts and floored my 2003 AWD , got Service Eng Light, P302'. Cyl 2 miss fire.

Wonder if plug fouled, or?
Top
Post Reply

Return to “TECHNICAL INFORMATION”