01-17-2009, 02:52 PM
Join Date: Apr 2008
99 Suburban OBDII codes
Once in November, and then twice in the past week, my suburban has the SES light come on. I went and had the codes read all three times, and each time it was
P0172 - rich bank 1
P0175 - rich bank 2
P0305 - Misfire cylinder 5
Here is the history on the vehicle.
Two new fuel pumps in past 18 months
Last time replaced was in June of '08, at
which time I also replaced the catalytic converter as well.
New OEM spark plugs in December.
When I replaced the plugs, number 5 was a little darker
than the others, looking like it was running rich.
Autozone said my MAF may be bad if both codes (P0172 and P0175) set
at the same time.
Anyone have any thoughts on this?
Thanks in advance.