Question about 1994 Toyota Previa

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What are the possible problems with the air flow meter?

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Sensor could be failed or intermittent. East to test with ohm meter.

Posted on Feb 26, 2015


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91 gmc 350v8 running rough at idel and high rpm

Check the mass air flow meter,, on the air intake hose. ONLY USE AIR FLOW METER CLEANER! First I would check the air filter. sounds like the engine is starving for air. Check all your vacuum lines also for leaks. Make sure all are attached to where they go. Also a possible dirty throttle body !

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2003 be jetta won't go more than 20 mph

Hi there? It sounds like the car is ranning on limp mode. Is the engine managment light on? if so, the air flow meter can cause this simptons. If you disconnect the air flow meter which is located next to the air filter box, it should improve it if it is disconnected, don't worry this will not cause any problems.
If it improves it by disconnecting the air flow meter then you'll need a new air flow meter..
Good luck......

May 20, 2011 | 2003 Volkswagen Jetta TDI

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One min light on i checked code p0102 came up was on for a day then i used it this morning light was off for like 6hours then now its back on

The light will go on and off until the actual system has failed.

P0102 - Mass or Volume Air Flow Circuit Low Input.

- Engine stall
- Engine running rough
- Excessive fuel consumption
- Excessive smoke
- Engine light ON

Possible Causes:
- Harness or connectors (The sensor circuit is open or shorted.)
- Intake air leaks
- Mass air flow sensor may be faulty

Possible Solutions:
- Replace air filter
- Clean air flow meter
- Replace air flow meter

Jan 18, 2011 | Pontiac Grand Prix Cars & Trucks

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99 Eclipse 2.4 cid idles erratically and eventually stalls. Unplug the air flow meter and idle quality gets much better and does not stall. Does this mean I have a defective air flow meter? Engine codes...

couple of possible problems

first thing i would check is to make sure air intake hose between Mass air flow sensor and intake doesn't have any cracks holes make sure clamps are tight

secondly check for vacuum leaks carb cleaner works great for this spray around intake gaskets throttle body fuel injectors vacuum lines when spraying u notice change in idle (if idle picks up or stubles) that where your problem is example you spray around intake gasket and idle picks up you have bad intake gasket

third thing is to try and clean the mass air flow sensor they make special cleaner for this (u can use carb cleaner for this but it can leave residue on sensor and damage it so it not recomended)

my best guess for you with all three o codes is you have a vacuum leak somewhere

Nov 13, 2010 | Mitsubishi Eclipse Spyder Cars & Trucks

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I recently purchased a C200 Merc with 162 000 Km. On two ocassions the car lost power and began to idle roughly. It would not accelerate at all and barely moved. A few moments later everthing went back to...

most possibly it could be the air mass sensor ( air flow meter) first check air flow meter, if you get in to the workshop and fixed the diagnose cpu you can see the fault code, if not the air flow meter next have to check crank angle sensor, if you check the fault code you can see what's wrong, if the fault code like mixtcher information retch or Lin replace air flow meter,

Oct 17, 2010 | 1998 Mercedes-Benz C-Class

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I am having problems with my c200 automatic 1998 model , the acceleration is rather on the too slow side and this was after i took it for the general servicing, i noticed on my DIY attempt that i...

possibly faulty air flow meter, start engine remove wire socket from air flow meter, is it better than before replace air flow meter, is this information helped you?

Sep 17, 2010 | 1998 Mercedes-Benz C-Class

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Mercedes Benz C-class 180C, the car stops engine each time I break, I have removed the switch connection to the air flow meter and this stops, what is the implication of removing the switch and driving car...

don't drive the car without air flow meter connected because the air flow meter signal very impotent for fuel mixture in combustion chamber, in your car faulty air flow meter replace air flow meter, is this information helped you?

Mar 24, 2010 | 1998 Mercedes-Benz C-Class

1 Answer


At some point you will need to verify fuel pressure and consider possible failing fuel pump.Early on these can be intermittant causing fuel loss to the injector.key on/engine off cycle will run the pump for 3 seconds.In a quiet place,like an enclosed garage you can listen to the pump running and many times in a failing state,it might sound abnormal,louder and squeelish in a sense which may substantiate this possibility.Other possibilities include air flow meter connected to the air intake tube.These were notorious for cold solder joints inside the electronic board.A tap test is helpfull on this problem.Gently tap the air flow meter and if it creates a miss while doing so,this could certainly be the culprit....good luck

Jul 29, 2009 | 1989 Buick Electra

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Air flow meter

air flow meters are expensive i would first replace the coolant temperature sensor

May 28, 2009 | 1996 BMW 318

1 Answer

Repair air flow meter

jjj8000: Your car uses what is called a "Hot wire air mass sensor"
This cylindrical black plastic component which has screens at both ends and an electrical connector with roughly 6 pins, is not a serviceable component. It has a set of wires inside of it which after the engine is shut off, gets to a temp over 1,000 degrees Fahrenheit to burn off residue collected on it during the time air has been passing over it. If I could repair this type of component in my shop, I would stand to make a lot of money! Unfortunately, it takes specialized testing equipment for the remanufacturing process. Not to mention the replacement components to put in to replace the ones needed to rebuild the cores.
I wish I could give you a better answer, but it's the only one I know. However, prior to condemning the air flow meter, make sure you have made the proper diagnosis. FALSE AIR problems are often diagnosed as air flow meters. Check and make sure the boots (hoses) which the attach the the air flow meter and go to the throttle body, have no tears or leaks. Make sure you have no split vacuum lines or hoses. Remember, the ECM determines the injector pulse width by the amount of air metered through that component. If any un-metered air that passes after the air flow meter, will create a situation of hesitation and stumbling, lean conditions and more. DO YOU HOMEWORK!"
I'm the new guy on the block here at "Fixya" and need all the feedback possible to get better ratings. If I have helped you, please write in. Thanks......mybunkey

Jan 13, 2009 | 1988 Nissan 300ZX

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