Question about Pontiac Grand Prix

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After changing fuel pump 2 days ago on my 97 pontiac gtp. it started idling high (2500rpm) then today after getting code p0102(maf sensor) and codes p0122-p0507-p1441 it died on way home and wont start. is it maf sensor($127)

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  • mandy lodge
    mandy lodge Jan 08, 2017

    have a look at my post top of page hope this helps

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3 Answers

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You can test the MAF before replacing. It may be a problem with the circuit itself or just a fluke from another problem that is connected to this sensor.

There are two basic types of mass airflow sensors: hot wire and hot film. In the first type, a very thin wire (about 0.2 mm thick) is used as the heated element.
after changing fuel pump 2 days ago on my 97 - f27-31.gif Components of a hot wire-type mass airflow sensor. Courtesy of Ford Motor Company. The element temperature is set at 100° to 200°C above incoming air temperature. Each time the ignition switch is turned to the off position, the wire is heated to approximately 1,000°C for 1 second to burn off any accumulated dust and contaminants.
The second type uses a nickel foil sensor, which is kept 75°C above ambient air temperatures. It does not require a burn-off period and therefore is potentially longer lasting than the hot wire type.
A faulty MAF will cause driveability problems resulting from incorrect ignition timing and improper air/fuel ratios.
Vane-type MAF Sensors
A vane-type MAF sensor is found on many import and domestic vehicles with EFI. All intake air must flow through the sensor. Some MAF sensors are called volume air flow meters

  • Begin checking a vane-type MAF sensor by checking the voltage supply wire and the ground wire to the MAF module before checking the sensor voltage signal.
  • Always follow the recommended test procedure in the manufacturer's service manual and use the specifications supplied by the manufacturer.
  • Typically, to test the sensor, a digital multimeter (DMM) is used and set on a DC voltage scale. The negative meter lead is connected to ground and the red lead to the MAF signal wire.
f_32.44.gif A voltmeter connected to measure the signal from a MAF sensor. Reproduced with permission from Fluke Corporation.
  • Turn on the ignition switch and press the min/max button, if available, on the DMM.
  • Slowly push the MAF vane from the closed to the wide-open position, and allow the vane to slowly return to thafter changing fuel pump 2 days ago on my 97 - f_27.33.gifsition.
f_27.33.gif Move the MAF sensor air vane from open to close to test it. Reproduced with permission from Fluke Corporation.
  • Observe the maximum and minimum voltage readings as the vane was moved.
  • If the minimum voltage signal is zero, there may be an open circuit in the MAF sensor variable resistor.
  • When the voltage signal is not within the manufacturer's specifications, replace the sensor.
WARNING While pushing the mass air flow sensor vane open and closed, be careful not to mark or damage the vane or sensor housing.
  • Some vehicle manufacturers specify ohmmeter tests for the MAF sensor.
  • With the MAF sensor removed, conafter changing fuel pump 2 days ago on my 97 - f_32.45.gifmmeter across the sensor's output and input terminals.
f_32.45.gif Ohmmeter connections to a MAF sensor. Reprinted with permission.
  • The resistance at these terminals is normally 200 to 600 ohms.
  • Connect the ohmmeter leads to the specified MAF sensor terminals, and move the vane from the fully closed to the fully open position.
  • Resistance specifications for a typical MAF sensor with door open and closed. Reprinted with permission.
    • When the ohmmeter leads are connected to the sensor's input and output terminals, the ohmmeter reading should increase smoothly as the sensor vane is opened and closed.
    • To check a vane-type MAF with a lab scope, connect the positive lead to the output signal terminal and the negative scope lead to a good ground.
    f_32.47.gif The trace of a defective vane-type MAF sensor. Reproduced with permission from Fluke Corporation. Hot-Wire-Type MAF Sensors
    The test procedure for heated resistor and hot-wire MAF sensors varies depending on the vehicle make and year. Always follow the test procedure in the appropriate service manual. A frequency test may be performed on some MAF sensors, such as the AC Delco MAF on some General Motors' products.
    • To check the MAF sensor's voltage signal and frequency, connect a voltmeter across the MAF voltage signal wire and ground wire.
    • Start the engine and observe the voltmeter reading.
    • On some MAF sensors, this reading should be 2.5 volts.
    • Lightly tap the MAF sensor housing with a screwdriver handle and watch the voltmeter pointer.
    • If the pointer fluctuates or the engine misfires, replace the MAF sensor.
    • Some MAF sensors have experienced loose internal connections, which cause erratic voltage signals and engine misfiring and surging.
    • Set the DMM so that it can read the frequency of DC voltage.
    • With it still connected to the signal wire and ground, the meter should read about 30 Hz with the engine idling.
    • Now, increase the engine speed, and record the meter reading at various speeds.
    • Graph thafter changing fuel pump 2 days ago on my 97 - f_32..48.gifreadings. The MAF sensor frequency should increase smoothly and gradually in relation to engine speed.
    • If the MAF sensor frequency reading is erratic, replace the sensor.
    f_32..48.gif Satisfactory and unsatisfactory MAF sensor frequency readings. Reproduced with permission from Fluke Corporation.
    • When a scanner is used to diagnose a General Motors' vehicle, one test mode displays grams per second from the MAF sensor. This mode provides an accurate test of the MAF sensor.
    • The grams per second reading should be 4 to 7 with the engine idling.
    • This reading should gradually increase as the engine speed increases.
    • When the engine speed is constant, the grams-per-second reading should remain constant.
    • If the grams-per-second reading is erratic at a constant engine speed or if this reading varies when the sensor is tapped lightly, the sensor is defective.
    • A MAF sensor fault code may not be present with an erratic after changing fuel pump 2 days ago on my 97 - f_32.49.gifecond reading, but the erratic reading indicates a defective sensor.
    • Frequency-varying types of MAF sensors can be tested with a lab scope.
    • The waveform should appear as a series of square waves.
    f_32.49.gif A normal trace for a frequency-varying MAF sensor. Courtesy of Progressive Diagnostics--WaveFile AutoPro.
    • If the MAF or connecting wires is defective, the traceafter changing fuel pump 2 days ago on my 97 - 00375_maf_burn_off_module.jpgin frequency.
    f_32.50.gif The trace of a defective frequency-varying MAF sensor. Courtesy of EDGE Diagnostics Systems.

    There is also a
    Mass Air Flow (MAF) Burn-Off Module Operation:
    00375_maf_burn_off_module.jpgA semi-conductor control for an electronic-ignition system.

Posted on Nov 17, 2009

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If you have a scan tool or know someone that does check what the temperature sensor is reading. It sounds like the sensor is registering cold making the computer dump gas into the injectors causing the engine to flood. You can test the theory by pushing the gas all the way to the floor and holding while trying to start the vehicle. If it does start then the problem is most likely the sensor it is mounted on the top front of the engine most likely and only costs about $12.

Posted on Nov 17, 2009

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The p0122 is for the throttle position sensor, p0507 is for the vehicle speed sensor, and 1441 is for the evap system. first check all your connections looks like you dont have everything plugged in correctly. as for the evap code i would check all your hose connections on the gas tank and fuel filler neck

Posted on Nov 17, 2009

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P0103 code. I cleaned maf still have same code and stalls. I disconnect maf still stalls. I changed it one year ago code come back after 4 weeks. I have 2000 Hyundai Elantra.


the ecm may be bad,
P0103 OBD-II Trouble Code Technical Description Mass Air Flow (MAF) Circuit High Input What does that mean? Basically this means that there is a problem with the Mass Air Flow High (MAF) sensor or circuit. A more technical description would be that the MAF circuit had higher than expected voltage (air flow). Other MAF sensor circuit DTC trouble codes are P0100, P0101, P0102, and P0104. Symptoms You will likely not notice any serious drivability problems, although there may be symptoms such as a general decrease in power or sluggishness. Causes A code P0103 may mean that one or more of the following has happened: The MAF may be disconnected, or a wiring connection may be bad The MAF sensor may be damaged The vehicle computer may be faulty (very rare) Possible Solutions The simplest thing to do is to reset the code and see if it comes back. Then start with the cheapest, easiest repair procedures: Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires. Inspect for any air leaks near the MAF sensor. Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor. Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information) Replace the MAF sensor. Register now to ask a question (free) Related P0103 DTC Discussions 2005 Duramax 6.6 P0103 help I have no clue where to begin looking for the solution to this code. Mass Air Flow (MAF) Sensor Circuit High Voltage is the description of the code, I've looked on various forums and i cant seem to find a definite cause. Ive cleaned the MAF several times with MAF cleaner. I seem to only get this c... 2002 Hyundai accent L 1.5 P0103 Put in a new MAF sensor but code still remains for MAF sensor high voltage. Using scan tool, the airflow rate=920 cf/m and the intake air temp reads -40?F at idle. Both readings are way out of the norm. Not sure what to do next, any ideas would be appreciated. P.S. I traced back the wires for MAF se... 2001 Mazda MPV p0103 & p0174 codes recently, this minivan has a P0103 & P0174 code. researched about the codes and MAF sensor seems like the common denominator between these 2 codes although according to Mazda, P0174 affected part is the fuel injection system where fuel trim system too lean while the 103 has the MAF as the part ... Corolla with MAF codes p0171 p0100 p0101 p0103 I have a 2000 corolla that I bought last fall. It had soft codes that didn't store. Now it has hard codes 0171, 0100, 0101, 0103. Today it started chugging and lurching during hard acceleration. I was a Toyota technician 10 years ago, but never really dealt with this particular model. It has 11... 2002 3.8L Pontiac GPX (P0172, P0101 and P0103) Hello, I have been having some rough starting, rough idle and stalling issues. I have printed off the P0172 page and started to replace items. Two weeks agao I got MAP codes. 1. So I replaced the MAP. It still had a stalling issue/rough idle. 2. So I changed the Idle control, PCV, cleaned my air fi...

Read more at: http://www.obd-codes.com/p0103
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May 30, 2015 | 2000 Hyundai Elantra

1 Answer

Error codes P0507 and P0102 after replacing MAF sensor


P0102: you need to make sure the sensor is clean; sometimes it get dirty as you are working on an old car. Check the voltage manually. Make sure there is no air leak near it

P0507: high idle... this sounds like a vacuum leak. get starter fluid and start the car. Spray around and check for change in car idle

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1 Answer

Error code P0102 MAF


sounds about right. you can try cleaning it with maf sensor cleaner first. if that doesnt work then replace it. do not touch the element with anything but the cleaner.

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1 Answer

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maf or vaf A curcuit low input, po141 is 02 sensor bank 1 sensor 2. this should be the 02 sensor after convertor,

May 15, 2010 | 2001 Pontiac Aztek

1 Answer

99 Grand Prix idles funny, dies got code p0102,


this vehicle most likely has a mass air flow sensor it may have got accidently unplugged or the air tube from mass airflow to engine is not connected well or it could be that you have indeed a bad mass air flow sensor they do make a special cleaner that you may want to try before purchasing a mass air flow sensor or purchasing one from salvage yard the symptoms you describe would be created by a bad massair flowsensor

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2 Answers

MAP sensor output voltage too low?


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P0102 is ---- mass or volume air flow circuit, low input.
Check the wires going to the maf sensor and at the connection. If all seems ok, you might need a new sensor, seeing how it ran a little better when disconnected.

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4 Answers

I have a 1997 Pontiac Grand Prix GTP. Recently put new fuel pump not even 3 months ago. New fuel filter as well same time. 2 weeks ago from today was going about 55 to 65 mph oil light comes on and car...


If you replaced the fuel pump then there is a possibility that during the job then some debris from the tank and/or filter got loose somewhere into the fuel system and is in your lines. It could even be a very tiny speck of gasket material, old or new.

Jun 16, 2009 | 1997 Pontiac Grand Prix

1 Answer

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p0102= mass air flow sensor is dirty or needs to be changed.
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