Question about 2001 Hyundai Santa Fe

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Check engine light

We have a 2001 santa fe. The check engine light keeps coming on and the diagoises is always the mass air flow censor...we've had it replaced twice! - is there something wrong with the check engine light not working correctly?

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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

Posted on Jun 25, 2009

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My 2001 hyundai santa fe engine revs up and down constantly. It doesn't matter if its in park or while driving. The check engine light has always come on and off. I've had that checked several


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Mar 20, 2012 | 2001 Hyundai Santa Fe

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My car keeps cutting off in traffic. I always have to restart it.


Theres only a few sensors that are needed for the car to run and will shut it off if they cut out. The Mass Air Flow Sensor (on or near the air box), or the Crank Sensor (which is screwed into the engine block) is probably faulty and turning off the car temperarily when it looses signal. take it to a kia shop and have them check those vital sensors with a kia computer diag tool. that will tell you everythingyou need to know. they might charge you .5 hour diagonostic time but its better then the hassle and expence of replacing parts

May 04, 2011 | 2003 Hyundai Santa Fe

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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

Car will not accelerate in high gears, and does


Ok... do you have the maintenance history on this vehicle? Did the 'Check Engine' Light come ON? Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on. You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Afterward, we might be able to help you DIAGNOSE and perhaps eventually fix the problem.

Jul 31, 2009 | 2001 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

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Check engine light on


Change the mass air flow meter

Jun 12, 2009 | 2003 Hyundai Santa Fe

1 Answer

Santa fe


P0102 - Mass Air Flow (MAF) Sensor Circuit Low Frequency

P1702 TPS - Abnormal
P1702 TPS - Malfunction Adjustment
P1703 TPS - Low Input
P1703 TPS - Open/Short (Ground)

Sep 27, 2008 | 2001 Hyundai Santa Fe

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