Question about 2002 Pontiac Grand Prix

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Where is the MAF sensor?

I bought a replacement today, but it doesn't appear to look the same as the one on the car. Can you tell me where the sensor is located? Maybe I am not looking at the correct part on my car.
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Where can I find a diagram to confirm location of maf

Posted on May 01, 2009

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The sensor in in the air intake hose between the air cleaner and the engine, it has a multi wire connector plugged to it.

Posted on Aug 04, 2008


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I got a code for the MAF SENSOR so I bought the piece and it cause my car to stall out. So I put the old piece in AND the car is running normal. the check engine light went off and comes on then goes off...

Code 102 means the MAF sensor is telling the computer there is very little air flow into the intake. Normally the airflow is lower at idle than when you are accelerating, but the sensor reading is lower than spec.
You could have a leaking hose between the MAF and the throttle body, or a vac leak somewhere else, the sensor could be faulty, or you could have a problem with the wiring harness.
All of these possible causes would apply to the replacement sensor that did not work.

Feb 06, 2013 | Cars & Trucks

1 Answer

Where is the MAF sensor located on a Toyota Landcruiser 2006 ? Cannot find it please help ...

This year and model 4.7 V8 doesn't use a MAF (mass airflow) sensor, it has what is called a MAP (manifold absolute pressure) sensor, it provides similar air flow info to the computer but works on vacuum sensed in the intake and is known as a "speed density" system of sensing. It appears it is located on the firewall of the engine and has a 7/32" vacuum hose from the engine going to it. See picture below.

Feb 24, 2012 | 2006 Toyota Land Cruiser

2 Answers

I'm getting error code P0102 which points to the MAF sensor. The car has no power one second and it works fine the next. It almost sounds like fuel is not getting through. Could it be the fuel filter?...

have a repair shop check out the MAF sensor signal. If they determine that its bad, get them to replace it. If that doesn't fix it, then its their problem, not yours. If you buy one and install it, and it doesn't fix it, your not getting your money back.

Sep 11, 2011 | 2003 Suzuki Aerio

1 Answer

Why does my car throw the code P0100 and P0325? I have a 1995 Nissan 240sx. and it has a random misfire once in a while.


Often a single issue can trigger multiple diagnostics codes, especially if the circuits are closely related.

Code P0100 = Mass Air Flow (MAF) Circuit malfunction

The computer has detected an issue with the MAF sensor.

- Verify the MAF sensor wiring is connected and wiring is in good condition
- Unplug and reconnect the MAF harness
- Check that voltage to the MAF sensor is within factory spec

Code P0325 = Knock Sensor # 1 Circuit malfunction

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. Knock sensors generally bolt into or thread into the engine block.

- Check condition of the knock sensor wiring.
- Test the 'Ohms' reading of your Knock Sensor (undo the connector and measure the pins) to ensure it is within spec (ask Nissan for this measurement). If out of spec, replace the knock sensor.


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Jun 08, 2011 | Nissan 240SX Cars & Trucks

2 Answers

MASS AIR FLOW SENSOR? 1991 Dodge Stealth RT

Yeah sound like the Mass Airflow sensor (MAF). This is one of those items you really shouldn't get at a junk yard.

Apr 21, 2010 | 1991 Dodge Stealth

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