Uplander P0172 code
Thread Starter
CF Junior Member
Joined: Nov 2013
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Uplander P0172 code
hi,new year, new problem with the uplander.
my check engine light is coming on, and my code reader says its a p0172. rich condition at bank 1.
ive researched it as best i can and it can be the maf, oxygen sensors.
i removed the maf, and cleaned it well. i verified that its working, so i pretty much ruled that out.
anyone see this code before? tips on getting rid of it without throwing tons of money at it.
thanx all.
my check engine light is coming on, and my code reader says its a p0172. rich condition at bank 1.
ive researched it as best i can and it can be the maf, oxygen sensors.
i removed the maf, and cleaned it well. i verified that its working, so i pretty much ruled that out.
anyone see this code before? tips on getting rid of it without throwing tons of money at it.
thanx all.
CF Senior Member
Joined: Aug 2008
Posts: 438
Likes: 8
From: Ontario, Canada
What year is your Uplander?
How many miles/Kms on it?
It is hard to know your situation if you don't share that "more info" ...
A quick Google of "p0172 Chev uplander" brought up pages of hits.
Good luck.
Bob R
How many miles/Kms on it?
It is hard to know your situation if you don't share that "more info" ...
A quick Google of "p0172 Chev uplander" brought up pages of hits.
Good luck.
Bob R
Super Moderator
Joined: Mar 2011
Posts: 9,175
Likes: 520
assuming you have an 08.
cleaning the maf usually does not fix bad maf sensors. It may be sending signals but they could be skewed...imo no way to know that by looking at scan data unless you have a second vehicle to reference.
this condition can only be caused by:
bad 02 sensor
bad maf
high fuel pressure
leaking purge solenoid
skewed OH sensor if you have a flex fuel vehicle
possibly a bad map sensor
so check your fuel pressure with a fuel pressure gauge first as this is the easiest to rule out. if your scan tool will show the OH sensor what is the value? If its anything over 10% that's your problem...reset it to 0
cleaning the maf usually does not fix bad maf sensors. It may be sending signals but they could be skewed...imo no way to know that by looking at scan data unless you have a second vehicle to reference.
this condition can only be caused by:
bad 02 sensor
bad maf
high fuel pressure
leaking purge solenoid
skewed OH sensor if you have a flex fuel vehicle
possibly a bad map sensor
so check your fuel pressure with a fuel pressure gauge first as this is the easiest to rule out. if your scan tool will show the OH sensor what is the value? If its anything over 10% that's your problem...reset it to 0
Last edited by tech2; Jan 16, 2014 at 7:56 PM.
Thread Starter
CF Junior Member
Joined: Nov 2013
Posts: 47
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its an 2008 with 75,000 km's
bought new and well cared for.
maf has been checked. o2 sensors have been bought, but its unlikely that.
I do have flex fuel.
thanx for the post tech2, excellent advice, its well appreciated.
bought new and well cared for.
maf has been checked. o2 sensors have been bought, but its unlikely that.
I do have flex fuel.
thanx for the post tech2, excellent advice, its well appreciated.
Last edited by princej; Jan 17, 2014 at 6:50 AM.
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Joined: Mar 2011
Posts: 9,175
Likes: 520
02 sensors?....this car only uses one precat 02 for fuel trim control. replacing the post cat sensor for this issue would be a complete waste.
if you have a method to check mafs other than replacement...I would love to hear it.
if you have a method to check mafs other than replacement...I would love to hear it.
