P0171 too lean bank 1
Jerry99
07-28-2009, 01:22 PM
Hello I am trying to find out if I have a bad o2 sensor
any help on this would be great
1999 Z24 Conv 2.4 aem short air induction
any help on this would be great
1999 Z24 Conv 2.4 aem short air induction
thisnametooktolong
07-28-2009, 02:15 PM
Probably not with a 171.
You can check it out with a scanner. The lean condition is usually caused by a few things. Low fuel pressure, plugged up injector, Intake leak? A good hole in just the right place in the exhaust., and a bad Hego. That thing is an OBD II so you can graph the Hego. If it is switching but not going above (around .5 or .6 volts) it could be a quad driver or the wires/ plug and of course the hego itself. This one takes a mind to actually make a diagnosis. Without the hands on I refuse to guess
Sorry this is not a sit at the computer and just guess kind of thing
You can check it out with a scanner. The lean condition is usually caused by a few things. Low fuel pressure, plugged up injector, Intake leak? A good hole in just the right place in the exhaust., and a bad Hego. That thing is an OBD II so you can graph the Hego. If it is switching but not going above (around .5 or .6 volts) it could be a quad driver or the wires/ plug and of course the hego itself. This one takes a mind to actually make a diagnosis. Without the hands on I refuse to guess
Sorry this is not a sit at the computer and just guess kind of thing
JerryZ24
08-06-2009, 01:21 PM
It was the fuel pump
and boy was it pricey
and boy was it pricey
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