P0171 and P0174
Thread Starter
Pro
Joined: Oct 2005
Posts: 623
Likes: 0
From: SpringHill Florida
P0171 and P0174
Have a friend with these codes P0171 and P0174 bank 1 and 2 too lean.
Does anyone have any ideas? The car is also exhibiting a slight pulsing rise and drop in RPM's at idle.
Does anyone have any ideas? The car is also exhibiting a slight pulsing rise and drop in RPM's at idle.
Burning Brakes
Joined: Jan 2003
Posts: 984
Likes: 0
From: New Smyrna Beach Fl
I had the exact same thing this spring. It was a vaccuum leak at the throttle body. Passenger side, just above the rocker cover (under the fuel rail cover) PCV hose had a hole in it at a 90 degree bend. GM wanted $400.00 for the "hose assembly" (they have been known to go bad) I fixed it for $2.00 with a piece of 3/8 neoprene fuel hose in 30 seconds. good luck.
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Intermediate
Joined: Jul 2008
Posts: 37
Likes: 2
From: Greer, South Carolina
I agree with the vacuum leak. Use a can of carb cleaner and lightly spray around the base of the intake. that may reveal any vacuum leaks.
Thats where Id start. If its runing rough, I know GM has a bullitin out for those codes plus a p0300 for bad bank 1 o2 sensors.
Hope that helps.
~CRV
Thats where Id start. If its runing rough, I know GM has a bullitin out for those codes plus a p0300 for bad bank 1 o2 sensors.
Hope that helps.
~CRV
Last edited by CrVetteteK; Jul 20, 2008 at 10:20 PM.
Intermediate
Joined: Jul 2008
Posts: 37
Likes: 2
From: Greer, South Carolina
Cool! Glad you found it! I know theres a bullitin for the trucks for manifold warpage - havent seen one for the cars - yet.
Im sure it will be fine - probably bad gaskets.
Keep us posted!
~CRV
Im sure it will be fine - probably bad gaskets.
Keep us posted!
~CRV
