Question about 2003 Nissan Sentra

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Maf I have a nissan sentra 1.8l, 2003. had a diagnostic done with a portable scanner, the code: P0102, indicating a problem with the Mass Air Flow sensor. My problem: The car starts just fine. Except when you increase the gas the engine chokes. And it ends up with a very rought idle. The vechicle will also move, but again when I put the car in forward motion and depress the gas pedal for more speed; the car dies out or feels like it is about run out of gas. I have replaced the fuel pump assy , the pvc valve with the same results. My question; does the MAF greatly affect the throttle and air intake? Another note, the butterfly on the throttle body seems to be harder than I think it should be. Would there be a problem with this as well.

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  • vj_shirley77 Sep 10, 2008

    I had forgotten to mention that i did replace the spark plugs. This was the first thing I replaced, followed by the fuel pump. Still have the same problem. Need to address the meaning to the code readout of; P0102. This according to the Haynes repair manual, indicates a Low Circuit Input. Does this mean I have replace the Mass Airflow Sensor? Through the dealer, this part is very expsensive.

  • vj_shirley77 Sep 10, 2008

    not yet known. but will try the recommended fix solutions soon. Hoping the suggestions will work. will keep posted on the solution.

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3 Answers

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Hi,

Simply stated, the mass air flow sensor senses the amount of air passing through it. It then sends signal to the car's computer to which then determines the amount of fuel injected into the combustion chamber. If the sensor is reading wrong, then the computer erroneously sends wrong amount of fuel to mix with the air. Once the mixture burns, the computer senses that the burn is wrong and tries to correct (feedback) and therefore tries to decrease or increase the amount of gas to compensate. But since the signal from the MAF is wrong, the decision/amount is also wrong hence your problem.

There are two school of thoughts on cleaning/replacing the MAF. Actually, there is a third which is relocating the MAF.

Back to your concern, offhand I would suggest cleaning the MAF. Pls reference this page for cleaning options/procedures on most Nissan models. The MAF sensor and the housing would look similar to the image here. If you would not be comfortable performing a DIY (do-it-yourself), then perhaps your best bet would be to seek the services of a qualified mechanic.

Should cleaning prove to be non-corrective, then the purchase would be justified.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 10, 2008

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  • Master
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Look at your mass air flow sensor to make sure there is no trash or bugs on the wire. there is a wire taht heats up the air pulling across cools it and takes more voltage to heat this is how computer know how much air is going into engine if not dirty you will need to replace.

Posted on Sep 10, 2008

  • TripleTauto
    TripleTauto Sep 10, 2008


    1. Check voltage between ECM terminal 51 (Mass air flow sensor signal) and ground.
    2. If the voltage is out of specification, proceed the following.



      • Turn ignition switch "OFF".
      • Disconnect mass air flow sensor harness connector and reconnect it again.
      • Perform steps 2 and 3 again.


    1. If NG, remove mass air flow sensor from air duct. Check hot film for damage or dust.
    2. If NG, clean or replace mass air flow sensor.

  • TripleTauto
    TripleTauto Sep 10, 2008

    they use a film instead of wire but same principle clean it check connections if doesnt fix then replace it

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Please get the plugs checked and replace the bad ones.

Posted on Sep 08, 2008

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1 Answer

What is causing recurrent DTC P0102?


code p 0102 refers to mass air flow (MAF) sensor/volume air flow(VAF) sensor--low input===causes ---wiring short to ground--MAF/VAF sensor---ecm
check the wiring to the unit--plug connection

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Code p0102 in a 2001 Cadillac sts Seville northstar engine wat does it mean


Code p0102, according to:

P0102 Cadillac Mass or Volume Air Flow Circuit Low Input

is "Mass or Volume air Flow Circuit Low Input"
Means that the computer isn't getting enough signal from your MAF sensor.

Check the link above for more information. MAF replacement isn't difficult.

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2000 nissan sentra 2.0 error codes p0101& p0102


P0102 - Mass Air Flow Sensor Circuit Malfunction

The mass air flownissan-maxima-maf-sensor.jpg or MAF sensor is placed in the intake air duct between the air filter and the engine intake manifold. The MAF sensor measures the amount of intake air flow. The MAF sensor converts the air flow measurement into a voltage or frequency signal, with the voltage or frequency changing proportionally to the amount of air flow. The air flow sensor signal is monitored by the engine computer (ECM). The engine computer (ECM) uses the mass air flow signal to know the engine load and to calculate the proper amount of fuel injected. If the signal from the mass air flow sensor is out of expected range, the ECM detects a fault and sets the code P0100. For example, the mass air flow sensor signal could be higher than expected when the engine is not running or lower than expected with the engine running. A car with the code P0100 may have some driveability issues, such as stalling, lack of power, surging, hesitation, etc. In some cars, the code P0100 can cause the fail-safe mode where the engine speed would be limited to 2,500 - 3,000 rpm.
If there are other trouble codes present, they might need to be looked at first. Checking the freeze frame may help, as it may contain some important information. The freeze frame is a snapshot of the engine parameters at the moment when the fault was detected. The freeze-frame may show whether the vehicle was running or stopped, whether the air-fuel ratio was lean or rich, was the engine was cold or warmed up at the time of the malfunction. Read more about the freeze frame.


Read more about mass air flow sensor.

What could cause the code P0100:
- faulty or contaminated mass air flow sensor
- open or short in the mass air flow sensor electrical circuit
- open or short in the sensor power or ground circuit

- other electrical problem with the MAF sensor wiring, (corroded wires, bent terminals, bad ground connection, burned fuse, etc.
- vacuum leaks
- restricted air flow at or before the air filter
- wrong air flow sensor installed
- problem with ECM





P0102 - Mass Air Flow Sensor Circuit Low

The mass air flow or MAF sensor measures the amount of air entering the engine. The engine computer (ECM) uses the mass air flow signal to calculate the amount of fuel injected (read more how the MAF sensor works below). The code P0102 is set when the signal from the mass air flow sensor is lower than expected. Often a car may exhibit some driveability symptoms, such as lack of power, surging, hesitation on acceleration, hard starting, pinging (detonation), or rough idle when started cold. Often the codes P0171 or P0174 could also be stored along with the code P0102, as the incorrect air flow signal can cause the engine to run lean. The codes P0171 and P0174 indicate a lean condition. Checking the freeze frame might help in the diagnostic process. The freeze frame is stored in the ECM along with the trouble code. The freeze frame contains some recorded parameters (e.g. vehicle speed, engine temperature, fuel trim) at the moment when the fault was detected. The freeze frame can also be accessed with a scan tool.



What could cause the code P0102
- faulty or contaminated mass airflow sensor
- debris blocking the air flow at the mass air flow sensor
- unmetered air leaking past the MAF sensor (vacuum leaks)
- PCV system vacuum leaks
- restricted or collapsed intake air duct
- dirty or restricted air filter
- restricted air screen before the air filter
- improper application of aftermarket components (e.g. cold intake, modified air filter, etc.)
- wrong air flow sensor installed
- electrical problem with the MAF sensor wiring, connector, power supply or ground.
- problem with ECM
- in some cases other issues with the fuel injection system like a clogged catalytic converter or a faulty manifold absolute pressure sensor (MAP) can also cause the code P0102.




Solution for MAF repair

Oct 20, 2012 | 2006 Kia Sorento

1 Answer

2003 Grand Am Has P0102


It is not an ECM/PCM problem.
P0102 - Mass or Volume Air Flow Circuit Low Input
Possible causes- Faulty mass air flow sensor
- Dirty mass air flow sensor
- Dirty air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks Tech notes Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor

Sep 27, 2012 | 2003 Pontiac Grand Am

1 Answer

98 gran prix p0102 obd code


P0102 - Mass Air Flow (MAF) Circuit Low Input
Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. A more technical description would be that the MAF circuit had lower than expected voltage (air flow).
A code P0102 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 may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF).
  • The MAF sensor may be faulty
  • The vehicle computer may be faulty (very rare)
Contact us if you need additional details. Good luck.

Sep 21, 2011 | 1998 Pontiac Grand Prix

2 Answers

Want to know engine light p0102 code means


P0102 is the generic DTC (Data Trouble Code) for (Mass or Volume Air Flow Circuit Low Input), and it would most likely be a fault with the MAF (Mass Air Flow) sensor.

The MAF sensor could be dirty or faulty, and there might even be restricted air flow to the MAF sensor (like a plugged up air filter). Also be sure that there are no air or vacuum leaks in the air induction system especially between the MAF sensor and the throttle body and that the hose clamps on the air induction system are all tight.

Jun 08, 2010 | 2001 Chevrolet Venture

3 Answers

I have a ford taurus 02' diagnostic code p0102..wat s wrong


P0102 OBD-II Trouble Code - Mass Air Flow (MAF) Circuit Low Input

What does that mean?
Basically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit. A more technical description would be that the MAF circuit had lower than expected voltage (air flow). Other MAF sensor circuit DTC trouble codes are P0100, P0101, 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 P0102 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 may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF).
* The MAF sensor may be faulty
* 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.

Hope help with this (remember rated this post).

May 21, 2010 | 2002 Ford Taurus

1 Answer

Engine surges just off idle,engine code p0102 in scan tool


P0102 is a problem with the Mass Air Flow (MAF) sensor or the air ducting after the MAF. If all air ducting hoses are properly connected and have no holes, then chances are the MAF is bad. Sometimes, you can restore by carefully cleaning with a good carb cleaner. If that doesn't solve it, you may need a new MAF.
Surging can also be the Throttle Position Sensor (TOS), but you don't indicate getting a code for that. from you

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poor start, very poor gas millage

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Service engine light


Good Day,

Code P0102 indicates MAF(Mass Air Flow) sensor circuit, low frequency detected

Code P0300 indicates Random Cylider miss fire, meaning missfire in more than one cylinder

The misfire could be a result of the mas air flow sensor being faulty.

Hope this helps for now

Let me know what size motor and if it's 2wd or 4wd and I can get detailed instructions for replacing

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