Question about 2001 Ford Explorer

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Engine light is on

I HAD A FULL SERVICE TUNE UP, AND I HAD MY MASS CINLENDER SENSOR CHANGE. WHAT ELSE TO DO.

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Hello;
First you need to find out what the codes are. Then you can isolate the problem.
What are the codes?
Thanks;
Rich
RPM Northwest

Posted on Feb 12, 2009

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2003 Nissan Altima 2.5L Service Engine Soon Light is on, Auto Zone says codes are for MAF and O2 Sensors. Car hard to start after driving a while but when starts appears to run smooth. Auto Zone thi


ok lets start with the codes they say your getting. P??? which 1's and how many. there are few o2 sensors, are they next to the Exhaust next to the converter? MASS AIR FLOW -MAF use this, for now i am guessing, until i see the correct codes your are getting. this could be the 1 you may have below, please read it........
  • P0103
    Mass Air Flow Sensor Circuit High Input
  • Possible causes
  • Faulty mass air flow sensor
    - Intake air leaks
    - Dirty mass air flow sensor
    - Dirty mass air filter
    - Mass air flow sensor harness is open or shorted
    - Mass air flow sensor circuit poor electrical connection
  • 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.
  • possible symptoms Engine Light ON (or Service Engine Soon Warning Light)
    - Engine stall
    - Engine running rough
    - Excessive fuel consumption
    - Excessive smoke
  • the code is generated when An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
2003 NISSAN Altima Sedan OBDII Codes List

Oct 22, 2014 | 2003 Nissan Altima

1 Answer

My 2002 kia sedona won't idle until warms up, dies when put into gear ...any ideas??


Is the check engine light on? you could have a bad ignition fail sensor, TPS sensor, or bad o2 sensor. it could also be a bad mass air flow sensor or a vacuum leak. without a code to help pin point the problem I'd start by checking those things first. Maybe try unplugging the mass airflow sensor and start it up and see if anything changes.

Oct 03, 2014 | 2002 Kia Sedona

2 Answers

I have a 98 isuzu rodeo and it wont stay running unless I keep my foot on the gas. The check engine light isnt on so I have no clue what to do, can anyone give me some suggestions please?


hot or cold engine,or both????????????????????
sure...
the ECU works OVERTIME; hard, to keep the engine running.
this is done by the action of the ISC valve.
so can you keep it running with a fast right foot??????????
a real mech needs to drive car.
does it have full power on hills?
is the tune up service done, the 60kmile repeats and needs to be done.
the ECU can not keep idle right on any engine that runs like crappppppp.

1: all fuses good.
2: engine never warms to normal 180F+ temp and hold???
3: not tuned up.
4: engine misfiring.
5: engine flooding.
6: engine starving for fuel.
7: OMG, the ISC wires fell off, (inspections do work on old cars)

there are simple tests. for each case.
one more #8. EFI system lost 12vdc power. stalls.
12.6vdc not running, 13.3v -15v running.

Jul 21, 2014 | 1998 Isuzu Rodeo

1 Answer

Can anyone tell me how to rest service engine soon light on a 1999 altima gxe?


the whole service engine light soon is on for just about everthing did you check to see if your oxegen sensor was good when you do an oil change you can reset the miles that you went and when you reset it you see how much miles you get from the new oil

Feb 26, 2012 | Nissan Altima Cars & Trucks

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

ABS light and check engine light is on. Not stock engine by a long shot. recent. cam, mass air set up, th350 trans, heads, headers, pipes etc. o2 sensors have been replaced. Does the computer need to...


I have a 95 Trans Am myself, with a worked 383 lt1 with full bolt ons. etc Your using the factory tune with that setup? While the check engine light might not be on because of the factory tune i would strongly suggest at the least, getting a mail order tune, and if you can, a dyno tune. You're not seeing the full potential of your setup the way it is now. Are you using an aftermarket mass air flow sensor? The stock mass air flow sensor flows plenty for most setups. Aftermarket sensors can cause driveability issues and many suggest staying away from them.
Are you able to scan the computer to retrieve the codes? It's impossible to diagnose the check engine light without knowing why it's on.

Nov 11, 2009 | 1994 Chevrolet Camaro

1 Answer

Engine light stays on , how to correct it ?


Hi there!

There may be a problem with the Catylist, O2 lambda sensor, or mass airflow sensor.

You would be advised to have these units tested. A simple metod is just to take it to a tune-up shop, as they will be able to analyize exhaust gasses, and test the required outputs.

Hope this helps you.

Jun 15, 2008 | 2000 Toyota ECHO

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