O2 Sensor

Doctor DeBo · 09-10-2005, 07:53 AM

I have a 96 that is showing a lean (code 175) in bank 2. Ive replaced the o2 sensor , but i am still getting the same problem. When it is cold at start up it has a bit of white smoke, but once it runs for a few seconds( mabey 5 to 10) it stops. Any ideas on what to do?

84LX89GT · 09-18-2005, 06:42 PM

How is the idle? if you spray some brake clean, carb cleaner or propane around the intake at idle and the engine runs better or revvs there's likely a vacuum leak around where you sprayed that would cause that code. Bank 2 if i remember correctly is the driver's side, so check for any holes in vacuum lines, especially PCV lines running from the valve cover to intake manifold. If the fault occurs at cruise speeds you might be looking at plugged injectors, fouled plugs maybe even a blown head gasket if it causes a misfire. Check compression, what the plugs look like, fuel pressure, and check for vacuum leaks and hopefully that will narrow it down.
Good luck.

09-10-2005, 07:53 AM	#1
Doctor DeBo Registered Member Join Date: Feb 2000 Location: Newnan, GA, UnitedStates Posts: 83	O2 Sensor I have a 96 that is showing a lean (code 175) in bank 2. Ive replaced the o2 sensor , but i am still getting the same problem. When it is cold at start up it has a bit of white smoke, but once it runs for a few seconds( mabey 5 to 10) it stops. Any ideas on what to do? __________________ 92LX 5.0 Hatch,4.10 gears Auburn Pro,Mosser axels,alum drive shaft AOD hi ratio gear set,3200 stall TCI conv,Bassani long tube headers/cats,2 chamber flow masters,2.5inch exhaust,331 stroker,alum GT40 heads ported,Omega 1.7 roller rockers,JE forged pistons,Eagle rods,E cam,GT40 upper/lower intake,70mm mass,73mm Pro M bullet,MSD ignition,Cartech fuel sys w/external Aeromotive fuel pump,30lb injectors,Vortech S trim,Tubular front end,D&D coil overs up front

09-18-2005, 06:42 PM	#2
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	Re: O2 Sensor How is the idle? if you spray some brake clean, carb cleaner or propane around the intake at idle and the engine runs better or revvs there's likely a vacuum leak around where you sprayed that would cause that code. Bank 2 if i remember correctly is the driver's side, so check for any holes in vacuum lines, especially PCV lines running from the valve cover to intake manifold. If the fault occurs at cruise speeds you might be looking at plugged injectors, fouled plugs maybe even a blown head gasket if it causes a misfire. Check compression, what the plugs look like, fuel pressure, and check for vacuum leaks and hopefully that will narrow it down. Good luck.

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