Question about 2008 Pontiac Grand Prix
What code did you pull ? How do you know it's bad ?
Remove the transaxle. Refer to Transmission Replacement for the 4T65-E transmission. Drain the cooling system. Refer to Cooling System Draining and Filling . Remove the bolts (2) from the knock sensor heat shield (1). Disconnect the knock sensor electrical connector (3) from the knock sensor.
Posted on Sep 14, 2016
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Posted on Jan 02, 2017
Bank 1 is the frt side exhaust manifold (did they say bank 1 sensor 1?),you can start by replacing that sensor,i would check the intake for leaks ,the gm 6cly. are known for bad intake gaskets,you will see oil coming out form the frt or rear of the intake,also check your atifreeze overflow bottle for bronwish sludge,which means that the oil is mixing with the antifreeze.A leaking intake could cause that lean condition.
Posted on Mar 29, 2009
What was the code? lean mixture? If so make sure there is no leak in the exhaust. I have worked on a lexus suv, but it was an 89. It had a lean mixture code. After examination I noticed a exhaust leak which was not apparent at first, there is a section in the exhaust the is very thin, and prone to leakage, causing the lean mixture code.
Posted on Jun 30, 2009
Standing in front of the car looking at the engine bank 1 is the cylinders on the front of the engine. These are cylinders 1-3-5. On the rear is bank 2 cylinders 2-4-6. The O2 sensor is located screwed into the exhaust manifold or the exhaust pipe on the front of the engine.
Posted on Oct 09, 2009
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Inspect the O2 sensor after the Catalytic converter, make sure the lead wires are good and not damaged from corrosion and heat. If all wire leads seem to be good, replace the O2 sensor and try to stay away from after market sensors. They don't last long and as for your Catalytic Converter, you can check it by bang in on it to see if there are any rattles coming form the inside.
The good news about a bad Catalytic Converter is that Gm covers them under warranty for up to 8 years.
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Posted on Jun 09, 2010
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