Question about 2002 Hyundai Santa Fe

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02 Santa Fe

What did they say was the problem? I have a feeling it's the mass air flow sensor. The check engine light went on about 6 months ago and the mechanic had cleaned it, but I took it to a new place after moving and they said it could be from the canister close valve??? and replaced that which didn't fix the problem!

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The mechanic is stumped, he has no clue what the problem is. but i have figured out it is not only when i gas up. i removed the gas cap with the car running and the car started shaking and running crappy, i also heard the gas bubbling inside the gas tank. i will call the mechanic with th new findings. will post when we can figure out what the problem is. 

Posted on Oct 20, 2008

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Mass air flow sensor voltage high


Hot-Wire-Type MAF Sensors
  1. To check the MAF sensor's voltage signal and frequency, connect a voltmeter across the MAF voltage signal wire and ground wire.
  2. Start the engine and observe the voltmeter reading.
  3. On some MAF sensors, this reading should be 2.5 volts.

Sep 29, 2016 | 2004 Hyundai Santa Fe

3 Answers

Almost no acceleration engine will not top 2K RPM under load.


Have you checked the air inlet sensor on the air filter. If this fails the engine goes into safety mode which it seems has happened. I don't know the specifics of the Santa fe but this is a feature of most modern electronic engine systems.

Nov 12, 2012 | 2004 Hyundai Santa Fe

1 Answer

My 2005 Sante Fe hesitates and won't get up to speed whenever it is damp or rainy outside. What causes this? Thanks


It could be your MAF (Mass Air Flow) sensor. Do you have any SEL {Service Engine) light coming on?

A mass air flow sensor is used to find out the mass of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the ambient temperature, altitude and use of a turbocharger and this is an ideal application for a mass sensor. (See stoichiometry and ideal gas law.)
There are two common types of mass airflow sensors in usage on automotive engines. These are the vane meter and the hot wire. Neither design employs technology that measures air mass directly. However, with an additional sensor or two, the engine's air mass flow rate can be accurately determined.
Both approaches are used almost exclusively on electronic fuel injection (EFI) engines. Both sensor designs output a 0.0- 5.0 volt or a pulse-width modulation (PWM) signal that is proportional to the air mass flow rate, and both sensors have an intake air temperature (IAT) sensor incorporated into their housings.
When a MAF is used in conjunction with an oxygen sensor, the engine's air/fuel ratio can be controlled very accurately. The MAF sensor provides the open-loop predicted air flow information (the measured air flow) to the ECU, and the oxygen sensor provides closed-loop feedback in order to make minor corrections to the predicted air mass.

May 27, 2010 | 2006 Hyundai Santa Fe

1 Answer

My check engine light came on my 02 SantaFe, what can i do?


Have the codes read to find out the fault code that triggers the light. Go to a mechanic, or your local auto parts superstore and have them check it. Hope this helps.

Apr 02, 2010 | 2002 Hyundai Santa Fe

4 Answers

I have a 2001 Santa Fe and the Engine light is lit and has been for many years. When I took the vehicle for the State Inspection I was told that the Co2 needed to be changed so the light would come off and...


The best thing to do is go to Auto Zone and get your Hyundai scanned for a DTC code. That would tell us which O2 sensor has gone bad. You have three O2 sensors and one of them has gone bad, the O2 sensor sends signals to the ecm to control the air fuel mixture so it will not run to rich or to lean which is causing you to fail the state inspection. Good luck and keep me posted on what the DTC codes are, be glad to help.

Jun 25, 2009 | 2001 Hyundai Santa Fe

1 Answer

Check engine light


No the light is fine its the computer or there is a intake leak somewhere causing the mass air flow sensor to not work correctly, also a cracked hose may be giving a false reading. Get a mechanic to test it with a voltmeter and ohmmeter using a vacuum gauge to make sure it is the mass air flow sensor

Jun 25, 2009 | 2001 Hyundai Santa Fe

1 Answer

When car is idling it misses a beat


sounds like it could be iac motor (idle air control) or maybe Mass air sensor . No check engine?? Also check and clean EGR ... at least thats a place to start.... You can also remove and clean IAC motor with carb cleaner.

Apr 05, 2009 | 2002 Hyundai Santa Fe

1 Answer

OBOII code PO171..??


I bouth a can of (MAF) Mass Air Flow sensor clearner and spray the sensor and the light went way

Aug 04, 2008 | 2001 Hyundai Santa Fe

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