Hello guys.
Does anyone have any knowledge about what this code (po171) refers to along with message that bank one is running lean? And it blows black smoke under load like when pulling my boat.
I also have a po420 code which I think relates to the catalytic converter. I think that's running cause I removed the cat and just ran straight. I don't think this is a problem.
Thanks in advance for any help.
PO171
PO171
99 4wd Astro LS Fully Loaded
Heavy Duty Tranny Cooler
K&N Air Filter
4-5" lift with 31" BFG All Terrains
Heavy Duty Tranny Cooler
K&N Air Filter
4-5" lift with 31" BFG All Terrains
-
SoCalli V8
- Retired
- Posts: 1209
- Joined: Wed Sep 20, 2006 5:42 pm
- Location: Lost Angels, Sovern KarlyFornia.
Re: PO171
How many miles on your van?
`86 V8 Lowered Cargo, extensively modified, shaved bald, wearing the shortest, sluttyest white primer dress....
A British Wanker living in So KarlyFornia.
My Astro tows my toys to Glamis sand dunes http://www.youtube.com/watch?v=jp2pqjQtpso
First ever canal jump at Glamis http://www.youtube.com/watch?v=oXZjM84x_Xc
A British Wanker living in So KarlyFornia.
My Astro tows my toys to Glamis sand dunes http://www.youtube.com/watch?v=jp2pqjQtpso
First ever canal jump at Glamis http://www.youtube.com/watch?v=oXZjM84x_Xc
Re: PO171
It's got 202,000 kilometers (roughly 120,000 miles)
99 4wd Astro LS Fully Loaded
Heavy Duty Tranny Cooler
K&N Air Filter
4-5" lift with 31" BFG All Terrains
Heavy Duty Tranny Cooler
K&N Air Filter
4-5" lift with 31" BFG All Terrains
-
LiftedAWDAstro
- I have my van tatooed on my cheeks
- Posts: 4379
- Joined: Sat Sep 09, 2006 3:35 pm
- Location: New Haven, NY
Re: PO171
The 420 code is low converter efficiency...generally because the cat is bad. Since yours is removed, that explains the code. The problem with the systems on these vans (OBD-2) is that the computer is looking at all the sensors and adjusts fuel accordingly. You may simply have a bad sensor that is causing a too rich condition. Bank 1 is the driver side sensors. Maybe it's time for a tune-up?
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
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