Question about 2001 Pontiac Grand Am SE

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How many O2 sensors are on the '01 Grand Am SE V6

Service Engine light on. Reading was 0172
How many O2 sensors are on the '01 Grand Am SE V6

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YOU HAVE 2 OXYGEN SENSORS.1 ABOVE THE EXHAUST MANIFOLD WHICH IS THE CRITICAL ONE AND YOU 1 OXYGEN SENSOR AFTER THE CATALYTIC CONVERTER.

Posted on May 11, 2010

Testimonial: "Thank you. I was told about the sensor above the manifold but no the other one. Had to change my spark plugs also. "

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Posted on Apr 30, 2010

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My check engine light has came on 3 time 2 of those time a it was hook to a tester code was 0172 the 3rd time it went off by itself thought it was due better gas I need help


Code 172 means the O2 sensor is telling the computer the fuel mixture is too rich.
The computer adjusts fuel mixture thru the injectors based on data from the O2 sensor among other things.
The problem could be the O2 sensor or something else like a faulty injector or air restriction.

Oct 13, 2015 | Cars & Trucks

1 Answer

What does the code 421 mean


the p0421 code on this vehicle is either caused by a bad catalytic converter or an oxygen sensor. your mechanic has a scan tool that he can verify if the converter is faulty by comparing the rear o2 sensor to the front sensor. If the rear o2 sensor's voltage is switching from rich to lean (01-1.0v) similar to the front's, then, it's a bad converter. The rear o2 sensor should keep a steady voltage reading. Have him do this test while at cruising speeds. good luck

Feb 28, 2014 | 2003 Mazda MPV

1 Answer

2001 Pontiac Grand Am SE O2 Sensor


Its not the O2 sensors, or the coolant sensor or the thermostat. Get the codes read front the computer. Post those codes here before you spend any more money or install the other parts.

Aug 10, 2012 | Pontiac Grand Am Cars & Trucks

1 Answer

Service light due to o2 sensor


Possibly a bad O2 sensor. Is the vehicle running bad or just CEL light on?

Jul 17, 2012 | Chevrolet Cars & Trucks

1 Answer

I recently had the manifold intake gasket replaced on my 01 grand am. approx 40 miles after it threw a code for bad bank 1 o2 sensor which we replaced, then it gave a code for bad catalytic convertor. We...


It's an o2 sensor code. So you more than likley have burnt wires associated with that o2 sensor.
P1133 = O2 Sensor Fault - Insufficient activity (Bank 1 , Sensor 1)You remove the negative battery connection from the negative battery terminal for 10 minutes.

You ALWAYS reset your computer when you do sensor swaps, when fixed erase code, and see if it stays out. your pcm is getting the wrong info from sensor. good-day !

Aug 16, 2011 | 2001 Pontiac Grand Am SE

2 Answers

I have a 2001 pontiac grand am se v6 . The service engine soon light came on and i got a free diagnostic ran and it brought up these codes; P0443, P0449, and P0141.


PO443, Evaporative Emission Control System Purge Control Valve Circuit Malfunction
PO449, Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
PO141, Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2).
I don't understand why the free diagnostic didn't come with a service recommendation?
P.S. I hope that you know when one of your headlights are out!

Aug 18, 2010 | 2001 Pontiac Grand Am SE

2 Answers

Sevice Vehicle Light


The service vehicle is not the same as the service engine light in that the service vehicle light has to do with the body control module,(BCM).You have to get the codes read for the BCM and any other module with the scan tool.I`m not sure if Auto Zone can read the BCM codes.Not all scan tools are able to read all the modules in a vehicle.Hope this helps.Good luck.

Mar 16, 2010 | 2000 Pontiac Grand Am GT

1 Answer

2003 Grand Prix service engine light on even after new catalytic


I wouldn't have gotten a cat. If the o2s are all replaced, then it could be an EGR valve

Oct 06, 2009 | 2003 Pontiac Grand Prix

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