WHERE IS O2 SENSOR BANK 1 01 GRAND PRIX 3.8 ENGINE

P0306 PONTIAC - Cylinder 6 Misfire Detected https://www.autocodes.com/p0306_pontiac.html

P0141 PONTIAC - O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2
P0141 Pontiac O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2

Would need more information if you're trying to diagnose a problem, but if its just replacement - Sensor 1 Bank 2 is the rear O2 sensor for an 04 Grand Prix - behind the catalytic converter and on top of the exhaust.

For a little bit technical. pcm send .450mv as reference the middle is .500mv it's rated o to 1000mv . The o2 sensor sense rich condition over .500mv and lower poor condition.It's switch from rich to poor condition all the time.But as to go near 100mv and 900mv if not o2 sensor could be at fault

The O2 sensor is behind the catalytic converter, it is referred to as the downstream or secondary O2 sensor.

Hi,
Upstream Oxygen sensor low voltage output bank1. Usually a bad o2 sensor. Bank 1 is cylinders 1-3-5 and upstream sensor usually on exhaust manifold. Replacement is recommended to clear the fault....Mike

probably not the o2 sensor but some other problem causing that code does it say bank 1 lean or rich?

The O2 sensors are located in the exhaust pipe between the exhaust manifold and the catalytic converter. When it's referring to a bank number, it's talking about which set of cylinders. I'm assuming that you have a v-6, if it's specifying a bank. Either way, There are two O2 sensors, one for each side of the engine, and you'll want to replace both, since whatever made the one go bad has probably done the same for the other side too. Anyways, it looks like a spark plug with 4 wires coming out the top screwed into your exhaust pipe. If you follow the exhaust from the engine, you will find your sensors. Hope this helped, and good luck.

Ac pressure sensor high voltage or o2 sensor bank 1 sensor 1 sluggush.

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.

Bank 1 O2 sensor.