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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Posted on Jan 02, 2017

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1 Answer

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

1 Answer

I have a 2005 Chrysler Town & Country with almost 100,000 miles. The check engine light came on about 2 months ago and the code said the O2 sensors needed to be replaced. About a month later, the...


there are no codes that say replace O2 sensors,or remove converter,Thats just somebody's guessing,When it says O2 sensor that tells the mechanic to look for trouble in that area,wiring or faulty readings,And there are four O2 sensors.

Jan 20, 2010 | 2005 Chrysler Town & Country

2 Answers

When driving my lincoln 1998 after about 10 miles or so, you can feel it hesitating about to stall.. there was a service engine light pointing to O2 sensor 1 bank II. could this be the cause? since the...


Hello. I can assist you. Generally when a scan is done, the technician will clear out all of the codes and hope that the problem self corrects. I am glad you passed the state emissions test. Now let's get to the bottom of the hesitation. Generally all lincoln and ford cars that hesitate like yours have a problem with the "mass airflow sensor". Most likely you will need to replace it.
The Air Flow Sensor or Mass Airflow Sensor (MAF) is one of the components of an electronic fuel injection system and is found in many of modern vehicles. The Mass Air Flow sensor is usually installed inside the intake air duct between the air filter and the engine. The Mass Air Flow sensor is used to measure the amount of air entering the engine. This measurement is used by the engine computer or ECM to calculate proper amount of fuel injected into the cylinders in order to provide optimum combustion and low emissions.
Problems with Mass Air Flow sensors are common. Bad or contaminated Mass Air Flow sensor can possibly cause a wide range of various vehicle driveability problems such as stalling, especially when the engine is cold, misfiring, poor acceleration, etc.
In addition, a problem with the Mass Air Flow sensor often causes the "check engine" or "service engine soon" light in the vehicle instrument panel to illuminate.
The "check engine" or "service engine soon" light comes on when the engine computer detects some fault in one of the components of the emission control system.

Nov 18, 2009 | 2001 Lincoln Town Car

1 Answer

Engine mis-firing


Mass Air Flow Sensor or Intake Absolute Pressure sensor


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Oct 07, 2009 | 1998 Ford Mustang

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