po172 error code
09-14-2015, 11:13 AM
#1
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Join Date: 08-09-2009
Location: wallaceburg,
Posts: 64
po172 error code
i have a 2011 hhr 19,ooo miles i had a code &replaced fuel cap 1 week later i now have a new code po172=fuel trim system rich.is this item something i can fix on my own or do i need to take it to dealer ship.as i have an OBD2 SCANNER &RAN THE CODE,will the dealership still want to charge me $100 to run a diagnostic code ?when i already know the error code.any help sorting this issue out would be greatly appreciated.
regards&later KEWATIN
im from ontario we have a tax for that/
regards&later KEWATIN
im from ontario we have a tax for that/
09-14-2015, 01:13 PM
#3
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Join Date: 10-13-2011
Location: Welland,Ont Canada
Posts: 36,586
According to this
OBD-II Trouble Code: P0172 System Too Rich (Bank 1)
Clean the Sensor mentioned in the article
OBD-II Trouble Code: P0172 System Too Rich (Bank 1)
Clean the Sensor mentioned in the article
09-14-2015, 05:15 PM
#4
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Join Date: 01-23-2009
Location: Fredericksburg,VA
Posts: 24,738
A vacuum leak is most common. That would include the EVAP valve under the hood.
The ECM interprets the extra air as a lean condition, so it adds more fuel to the mixture, which causes the "too rich" condition. Aren't computers a kick in the head?
The ECM interprets the extra air as a lean condition, so it adds more fuel to the mixture, which causes the "too rich" condition. Aren't computers a kick in the head?
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