Question about 2003 Ford Taurus

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P171 p174 we replaced the maf sensor and the check engine light still comes on and the puttering and possible stauling is still happening, do you think it was a defective part or is it something else? thanx

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  • Anonymous Feb 10, 2009

    I have same problem with Ford F150 (2002). Problem started after I replaced fuel pump and fuel filter?

  • Anonymous Mar 17, 2014

    engine like can be turn off but comes back on

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Do you have access to a scan tool? A more common cause for this condition is a vacuum leak. You can verify this if you check your long and short fuel trims. If the numbers are above 10 percent at idle and drop when you raise the rpm, you need to check for a vacuum leak.If they stay the same then I would look into the fuel pressure and volume.Hope this helps. If not, hit me back and I'll see what else we can do.Good luck.

Posted on Aug 26, 2008

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MAF Sensor Screws


Bosch MAF sensor? The two screws that hold the sensor in to the tube? These screws, if missing, will not allow unmetered air into the engine, so will not be the reason your light is coming on. What is making you think your light coming on has something to do with your missing screw? Do you have a fault code, or codes? If so, what do you have?

Sep 13, 2013 | Volvo S40 Cars & Trucks

1 Answer

My Check engine light will not stay off long enough to get it inspected 2 codes pop up after every reset they are P0125 and P0171 I have replace Catalytic Converter and o2 censor reset the computer an...


The best thing to do is, remove and clean all the sensors and connectors I have listed below.

A code P0125 may mean that one or more of the following has happened:
  • Insufficient warm up time
  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty coolant temperature sensor
Possible Solutions The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty ECT sensor, or a low coolant level).
Other ECT sensor and circuit related DTCs

A code P0171 may mean that one or more of the following has happened:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty
    Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor
  • Possible cracked vacuum or PCV line/connection
  • Faulty or stuck open PCV valve
  • Failed or faulty oxygen sensor (bank 1, sensor 1)
  • Sticking/plugged or failed fuel injector
  • Low fuel pressure (possible plugged/dirty fuel filter!)
  • Exhaust leak between engine and first oxygen sensor
Possible Solutions A lot of times, cleaning the MAF sensor and finding/fixing vacuum leaks fix the problem. If you're on a tight budget, start there, but that may not be the fix for certain. So, possible solutions include:
  • Clean the MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
  • Inspect all vacuum and PCV hoses, replace/repair as required
  • Inspect all hoses and connections in the air intake system
  • Inspect and/or test the intake manifold gaskets for leakage
  • Check for a dirty fuel filter and proper fuel pressure
  • Ideally you'll want to monitor short and long term fuel trims using an advanced scan tool

Oct 26, 2012 | 2000 Hyundai Sonata

1 Answer

My 1992 Ford Taurus sputters first thing in the morning, but clears up after 10 minutes of driving and runs good the rest of the day. Would the maf sensor cause this I replaced all ignition parts. Still...


Does the check engine light come on I would think it would if the maf sensor or tps is malfunctioning! Try to get the code but its prob the tps..

Dec 21, 2011 | 1992 Ford Taurus

2 Answers

Buick regal 2002 gs...when i stop at a light the engine just quits.I put it in neutral and it will start right up again....This happens about 4/5 times a week. i .replace the crank sensor. but .check...


P0100 - Mass Air Flow (MAF) Circuit Malfunction

Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. Other MAF sensor circuit DTC trouble codes are P0101, P0102, P0103, 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 P0100 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 faulty

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.
* Unplug and reconnect the MAF wiring harness
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information)
* Replace the MAF sensor

Then, like a reference guide check this TSB DTC P0102 MAF and this article about Mass Air Flow sensor, what does it do and how it does it.
Test, check it and keep us updated.

May 27, 2011 | 2002 Buick Regal

1 Answer

2002 impala 3.8L 180,000kms. Having problems with car hesitating on acceleration(not all the time). Had maf sensor & idle air control sensor replaced recently. Fuel filter, air filter,new plugs &...


it is possibly the throttle position sensor(tps) malfunctioning. basically the computer or "brain" of the car thinks the throttle is in a different position than it really is and automatically makes adjustments to fuel, air ect.... based on these false readings from the sensor thus causing the engine to react a little different when you expect to have power.

May 14, 2011 | 2002 Chevrolet Impala

1 Answer

Check Engine Light PO104


Generic Code description from: http://www.obd-codes.com/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 P0104 may mean that one or more of the following has happened:

  • The mass air flow (MAF) circuit is incomplete (broken / frayed wire, etc.)
  • There is an air leak in the intake system
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.
  • Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information)
  • Replace the MAF sensor.

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Feb 27, 2011 | Ford F-150 Cars & Trucks

1 Answer

My check engine light is on & the dtc is p0171 2005 chevy impala


I found this On-Line

Causes A code P0171 may mean that one or more of the following has happened:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor.
Possible Solutions Possible solutions include:
  • In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
  • Inspect all vacuum and PCV hoses, replace if necessary
  • Check for a dirty fuel filter and proper fuel pressure2_bing.gif

Jun 07, 2010 | 2005 Chevrolet Impala

2 Answers

2004 Infinity QX4 Service engine soon light comes on. The right catalytic convertor replaced. The crank sensors have been replaced. It has had the oil replaced and the O rings replaced. The car runs fine,...


you will need to have the light put out thats all ,try holding the trip meter switch down then turn ignition on and holding the switch in see what happens .

Mar 17, 2010 | 2004 Infiniti QX4

1 Answer

Engine sputters while check engine light flashes rapidly. sometimes the 4wd light comes on, the VDC and SLIP light always comes on. At that point the engine sputters, no acceleration possible, still have...


The issue is your Mass Air Flow Sensor (MAF) and more than likely also the Intake Air Temperature Sensor (IAT) which is part of the MAF housing. Both are probably malfunctioning. This can be due to an overused/very dirty air filter, or even an aftermarket air filter (that uses oil on the filter element), or diriving in very dusty/dirty areas.

2 fixes.
1) Get MAF cleaner of Electrical connection cleaner in a spray can from your local auto parts store. Locate the MAF, which is on the intake tube, drivers side, just after the air filter. It is held down by 2 hex screws. remove it (try not to touch the metal with your hands, and DO NOT touch the little sensors that look like wire resistors you will see inside, if you touch them, it will no longer work!), spray it VERY WELL with the cleaner (use the whole can if you feel the need) let dry in ambient air for at least 10 minutes, re-install and like magic, your car will start & run, probably better than before you had the issue. The CATCH IS, this can end up being a short term fix, may happen again after 10 miles, or 20,000 miles, but it will more than likely happen again.
2) Replace the MAF with a new unit, or have your vehicle serviced under warranty, and have the dealership replace this part.

Oct 22, 2009 | 2005 Nissan Xterra

1 Answer

I have engine light on and I got the check engine light codes: P0121 and P0171 for my 1997 Chevy Cavalier. What does it mean? Thank you!!


A code P0121 may mean that one or more of the following has happened:
  • TPS has intermittent open or short internally
  • Harness is rubbing and causing an open or short in the wiring
  • Bad connection at the TPS
  • Bad PCM (less likely)
  • Water or corrosion in connector or sensor
(TPS = throttle position sensor - mounted on side of throttle body and connected to accelerator linkage.)
Causes A code P0171 may mean that one or more of the following has happened:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor.
Possible Solutions Possible solutions include:
  • In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
  • Inspect all vacuum and PCV hoses, replace if necessary
  • Check for a dirty fuel filter and proper fuel pressure
Hope this helps.

Aug 21, 2009 | 1997 Chevrolet Cavalier

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