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  • We Stock the following top leading brands, including Hitachi, Cardone, Delphi, Standard Ignition
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We also have Mass Air Flow Sensor parts for other Lexus models, including ES330, GS300, GS400, GX470, IS250, IS300, LS400, LS430, LX470, RX300, RX330, RX350, SC300, SC400.


Hitachi
2005 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Hitachi

P311-2142FEB    MAF0103  New

22204-75030

Qty:
In Stock & Ready to Ship
$69.95
Hitachi Mass Air Flow Sensor
  • Air Flow Sensor
  • From 05/2005; Grade: Actual OE Terminal Quantity: 5 Availability: Available to Order Housing Included: No Terminal Type: Blade
  • Hitachi Air Flow Sensor – NEW Actual OE Part
  • Product Attributes:
    • Manufacturer: Hitachi
  • Hitachi's Air Flow Sensors (MAFs) measure the amount and characteristics of air entering the engine. Hitachi uses precision elements and high-quality components for enhanced durability and accurate air flow measurements. Hitachi MAFs are 100% air flow tested for ideal performance and are calibrated for each application ensuring your vehicle meets the strict emission standards set by the manufacturer. Details such as a contaminant bypass port (when applicable) and protected circuitry providing a durable and reliable product approved by OE manufacturers makes Hitachi's air flow sensors the premium choice.
Brand: Hitachi
Additional Fitment Information:
Vehicle Submodel Block Engine CID CC
2005 - Lexus GX470 Base V 8 Cyl 4.7L 285 4663
Hitachi
2005 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Hitachi

P311-3D0394F    MAF0056  New

22204-75020

Qty:
In Stock & Ready to Ship
$83.47
Hitachi Mass Air Flow Sensor
  • Air Flow Sensor
  • To 11/2004; Grade: Actual OE Terminal Quantity: 5 Availability: Available to Order Housing Included: No Terminal Type: Blade
  • Hitachi Air Flow Sensor – NEW Actual OE Part
  • Product Attributes:
    • Manufacturer: Hitachi
  • Hitachi's Air Flow Sensors (MAFs) measure the amount and characteristics of air entering the engine. Hitachi uses precision elements and high-quality components for enhanced durability and accurate air flow measurements. Hitachi MAFs are 100% air flow tested for ideal performance and are calibrated for each application ensuring your vehicle meets the strict emission standards set by the manufacturer. Details such as a contaminant bypass port (when applicable) and protected circuitry providing a durable and reliable product approved by OE manufacturers makes Hitachi's air flow sensors the premium choice.
Brand: Hitachi
Additional Fitment Information:
Vehicle Submodel Block Engine CID CC
2005 - Lexus GX470 Base V 8 Cyl 4.7L 285 4663
Hitachi
2004 Lexus GX470 Mass Air Flow Sensor Hitachi

P311-5BF42B0    W0133-1740641  New

Qty:
In Stock & Ready to Ship
$183.99
Hitachi Mass Air Flow Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • 100% New
Brand: Hitachi
Additional Fitment Information:
Vehicle
2004 - Lexus GX470
Cardone
2006 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-3C29315    86-50056  New

222040F030 , 2220475030 , 8976019670

Qty:
In Stock & Ready to Ship
$106.82
Cardone Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • CARDONE Engineered Technology ensures that all CARDONE® New Mass Air Flow Sensors precisely track O.E. output curves and maintain strict tolerances to ensure accurate scan tool readings for proper operation. Every component is rated to handle a broad range of environmental conditions, including temperature and altitude.
Brand: Cardone
Additional Fitment Information:
Vehicle
2006 - Lexus GX470
Cardone
2003 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-5C1021A    86-50021  New

2220407010 , 222040F010 , 2220475020 , 222500F010 , AFH70M20

Qty:
In Stock & Ready to Ship
$79.95
Cardone Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • CARDONE Engineered Technology ensures that all CARDONE® New Mass Air Flow Sensors precisely track O.E. output curves and maintain strict tolerances to ensure accurate scan tool readings for proper operation. Every component is rated to handle a broad range of environmental conditions, including temperature and altitude.
Brand: Cardone
Additional Fitment Information:
Vehicle
2003 - Lexus GX470
Cardone
2005 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-5C1021A    86-50021  New

Qty:
In Stock & Ready to Ship
$79.95
Cardone Mass Air Flow Sensor
  • Before 11/2004
  • Mass Air Flow Sensor
  • CARDONE Engineered Technology ensures that all CARDONE® New Mass Air Flow Sensors precisely track O.E. output curves and maintain strict tolerances to ensure accurate scan tool readings for proper operation. Every component is rated to handle a broad range of environmental conditions, including temperature and altitude.
Brand: Cardone
Additional Fitment Information:
Vehicle
2005 - Lexus GX470
Cardone
2005 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-3C29315    86-50056  New

Qty:
In Stock & Ready to Ship
$106.82
Cardone Mass Air Flow Sensor
  • From 11/2004
  • Mass Air Flow Sensor
  • CARDONE Engineered Technology ensures that all CARDONE® New Mass Air Flow Sensors precisely track O.E. output curves and maintain strict tolerances to ensure accurate scan tool readings for proper operation. Every component is rated to handle a broad range of environmental conditions, including temperature and altitude.
Brand: Cardone
Additional Fitment Information:
Vehicle
2005 - Lexus GX470
Cardone
2007 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-11C87D4    74-50056  Remanufactured

222040F030 , 2220475030 , 222500F030 , 2225075030 , 8976019670

Qty:
In Stock & Ready to Ship
$21.60 $83.43
Cardone Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • CARDONE® Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.
Brand: Cardone
Additional Fitment Information:
Vehicle
2007 - Lexus GX470
Cardone
2005 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-11C87D4    74-50056  Remanufactured

Qty:
In Stock & Ready to Ship
$21.60 $83.43
Cardone Mass Air Flow Sensor
  • From 11/2004
  • Mass Air Flow Sensor
  • CARDONE® Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.
Brand: Cardone
Additional Fitment Information:
Vehicle
2005 - Lexus GX470
Cardone
2003 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-16A2C6C    74-50021  Remanufactured

2220407010 , 222040F010 , 2220475020 , 222500F01 , 222500F010 , AFH70M20

Qty:
In Stock & Ready to Ship
$25.20 $84.09
Cardone Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • CARDONE® Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.
Brand: Cardone
Additional Fitment Information:
Vehicle
2003 - Lexus GX470
Cardone
2005 Lexus GX470 Mass Air Flow Sensor Cardone - Mass Air Flow Sensor

P311-16A2C6C    74-50021  Remanufactured

Qty:
In Stock & Ready to Ship
$25.20 $84.09
Cardone Mass Air Flow Sensor
  • Before 11/2004
  • Mass Air Flow Sensor
  • CARDONE® Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.
Brand: Cardone
Additional Fitment Information:
Vehicle
2005 - Lexus GX470
Delphi
2004 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Delphi

P311-2ACE5B6    AF10133  New

128 51007 , 128 51008 , 128 51011 , 12851007 , 12851008 , 12851011 , 157-0249 , 157-0264 , 1570249 , 1570264 , 158-0777 , 1580777 , 2133431 , 2133432 , 22204-0F010 , 22204-75020 , 222040C010 , 222040F010 , 2220475010 , 2220475020 , 222500C010 , 2225075020 , 24230M , 24231M , 24235M , 5S2739 , 5S2893 , 5S2894 , 5S2896 , 5S2905 , 74-50021 , 74-50022 , 7450021 , 7450022 , 86-50021 , 8650021 , 917-924 , AFH70M-20M , MA182 , MA185 , MAF0048 , MAF0049 , MAF0050 , MAF0056 , MAF10133 , MAF650021 , MAS0191 , MAS0245 , MF4230 , MF4231 , MF4235 , SU5182 , SU5185 , SU5186 , SU5218 , SU5376 , XTP450021 , XTP450022

Qty:
In Stock & Ready to Ship
$97.90
Delphi Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Probe Only
  • Product Attributes:
    • Color: Black And Silver
    • Housing Included: No
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Blade
    • Wiring Harness Included: No
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Block Engine CID CC
2004 - Lexus GX470 V 8 Cyl 4.7L 285 4663
Delphi
2005 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Delphi

P311-0493BE9    AF10205  New

213-4543 , 2134543 , 221083M , 22204-0F030 , 22204-75030 , 222040F030 , 2220475030 , 5S6299 , 64-1836 , 74-50056 , 86-50056 , 917-925 , AFH70M-47M , MA192 , MAF0035 , MAS0177 , MAS0245 , MF21083 , SU10593 , SU7810 , XTP450056

Qty:
In Stock & Ready to Ship
$91.68
Delphi Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Probe Only From 11/2004
  • Product Attributes:
    • Color: Black And Silver
    • Housing Included: No
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
    • Wiring Harness Included: No
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Block Engine CID CC
2005 - Lexus GX470 V 8 Cyl 4.7L 285 4663
Delphi
2005 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Delphi

P311-2ACE5B6    AF10133  New

Qty:
In Stock & Ready to Ship
$97.90
Delphi Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Probe Only To 11/2004
  • Product Attributes:
    • Color: Black And Silver
    • Housing Included: No
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Blade
    • Wiring Harness Included: No
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Block Engine CID CC
2005 - Lexus GX470 V 8 Cyl 4.7L 285 4663
Delphi
2008 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Delphi

P311-0493BE9    AF10205  New

Qty:
In Stock & Ready to Ship
$91.68
Delphi Mass Air Flow Sensor
  • Mass Air Flow Sensor
  • Probe Only
  • Product Attributes:
    • Color: Black And Silver
    • Housing Included: No
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
    • Wiring Harness Included: No
  • 100 years of OE experience, supplier to the world's top automakers, OE Heritage and knowledge built into every aftermarket part.
Brand: Delphi
Additional Fitment Information:
Vehicle Block Engine CID CC
2008 - Lexus GX470 V 8 Cyl 4.7L 285 4663
Hitachi
2004 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Hitachi

P311-3D0394F    MAF0056  New

Qty:
In Stock & Ready to Ship
$83.47
Hitachi Mass Air Flow Sensor
  • Air Flow Sensor
  • Grade: Actual OE Terminal Quantity: 5 Availability: Available to Order Housing Included: No Terminal Type: Blade
  • Hitachi Air Flow Sensor – NEW Actual OE Part
  • Product Attributes:
    • Manufacturer: Hitachi
  • Hitachi's Air Flow Sensors (MAFs) measure the amount and characteristics of air entering the engine. Hitachi uses precision elements and high-quality components for enhanced durability and accurate air flow measurements. Hitachi MAFs are 100% air flow tested for ideal performance and are calibrated for each application ensuring your vehicle meets the strict emission standards set by the manufacturer. Details such as a contaminant bypass port (when applicable) and protected circuitry providing a durable and reliable product approved by OE manufacturers makes Hitachi's air flow sensors the premium choice.
Brand: Hitachi
Additional Fitment Information:
Vehicle Submodel Block Engine CID CC
2004 - Lexus GX470 Base V 8 Cyl 4.7L 285 4663
Hitachi
2007 Lexus GX470 Mass Air Flow Sensor 8 Cyl 4.7L Hitachi

P311-2142FEB    MAF0103  New

Qty:
In Stock & Ready to Ship
$69.95
Hitachi Mass Air Flow Sensor
  • Air Flow Sensor
  • Grade: Actual OE Terminal Quantity: 5 Availability: Available to Order Housing Included: No Terminal Type: Blade
  • Hitachi Air Flow Sensor – NEW Actual OE Part
  • Product Attributes:
    • Manufacturer: Hitachi
  • Hitachi's Air Flow Sensors (MAFs) measure the amount and characteristics of air entering the engine. Hitachi uses precision elements and high-quality components for enhanced durability and accurate air flow measurements. Hitachi MAFs are 100% air flow tested for ideal performance and are calibrated for each application ensuring your vehicle meets the strict emission standards set by the manufacturer. Details such as a contaminant bypass port (when applicable) and protected circuitry providing a durable and reliable product approved by OE manufacturers makes Hitachi's air flow sensors the premium choice.
Brand: Hitachi
Additional Fitment Information:
Vehicle Submodel Block Engine CID CC
2007 - Lexus GX470 Base V 8 Cyl 4.7L 285 4663
Standard Ignition
2008 Lexus GX470 Mass Air Flow Sensor Standard Ignition

P311-1498BFA    MAS0177  New

1MF219 , 2-14624 , 2220475030 , 245-1178 , 5S2905 , 5S9131 , 64-2102 , 74-50056 , 86-50056 , AF10205 , DL-3019 , MA1048 , MA192 , MAF0103 , SU10593

Qty:
In Stock & Ready to Ship
$68.10
Standard Ignition Mass Air Flow Sensor
  • Mass Air Flow
  • Product Attributes:
    • Attachment Method: Bolt On
    • Connector Gender: Female
    • Connector Quantity: 1
    • Connector Shape: Oval
    • Housing Included: No
    • Material: Metal, Plastic
    • Notes: Sensor Only
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Pin
  • 100% new, never remanufactured, so there's no leftover debris that can cause sensor failure. 100% computer-tested to ensure the ECU receives accurate airflow readings under hard engine conditions, which are required to balance and deliver the correct air/fuel ratio to the engine in order to achieve clean burns. Hybrid technology ensures reliable electronic circuitry. Lack of moving parts in sensor ensures wear-free sensor life. Manufactured to strict quality standards to ensure each part outperforms other air flow sensors in aftermarket.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle
2008 - Lexus GX470
Standard Ignition
2005 Lexus GX470 Mass Air Flow Sensor Standard Ignition

P311-37CC1E3    MAS0245  New

157-0249 , 158-1538 , 1MF206 , 2-14642 , 222040F010 , 2220475010 , 245-1169 , 245-1192 , 5S2893 , 5S2905 , 64-1685 , 74-50021 , 86-50021 , 917-913 , 917-924 , AF10133 , DL-3013 , MA1083 , MA182 , MAF0055 , SU5182 , SU5186

Qty:
In Stock & Ready to Ship
$73.67
Standard Ignition Mass Air Flow Sensor
  • Mass Air Flow
  • Product Attributes:
    • Attachment Method: Bolt On
    • Connector Gender: Female
    • Connector Quantity: 1
    • Connector Shape: Rectangular
    • Housing Included: No
    • Material: Metal, Plastic
    • Notes: Sensor Only
    • Terminal Gender: Male
    • Terminal Quantity: 5
    • Terminal Type: Blade
  • 100% new, never remanufactured, so there's no leftover debris that can cause sensor failure. 100% computer-tested to ensure the ECU receives accurate airflow readings under hard engine conditions, which are required to balance and deliver the correct air/fuel ratio to the engine in order to achieve clean burns. Designed and developed to improve engine performance, reduce harmful emissions, and increase fuel efficiency. Manufactured and calibrated to strict quality standards to ensure optimum performance.
Brand: Standard Ignition
Additional Fitment Information:
Vehicle
2005 - Lexus GX470
Hitachi
2004 Lexus GX470 Mass Air Flow Sensor Hitachi

P311-5BF42B0    W0133-1740641  New

Qty:
In Stock & Ready to Ship
$183.99
Hitachi Mass Air Flow Sensor
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • 100% New
Brand: Hitachi
Additional Fitment Information:
Vehicle
2004 - Lexus GX470

Latest Car Advice

CarJunky AutoAdvice

mass air flow sensor replaced but code still keeps coming on and off

Showing 3 out of 3 Posts
Question From o3chevy on mass air flow sensor replaced but code still keeps coming on and off

I have a 2003 chevy avalanche it had a mass air flow sensor code so i replaced the mass air flow sensor but the code keeps coming on and off. Along with this the transmission does not shift properly. sometimes the rpms will go to 4500 before it will shift. Are these two problems connected somehow?

Response From Hammer Time Top Rated Answer

Just because you have a code referring to a specific sensor does not mean the sensor is the cause. The problem still needs to be troubleshooted properly.
Make sure there are no air leaks in the intake snorkel anywhere.

Response From Discretesignals

What is the trouble code number? Which engine?

Mass Air Flow sensor?

Showing 3 out of 3 Posts
Question From ford91486 on Mass Air Flow sensor?

Just a general question here. My mechanic did some engine work for me. Now it is idleing like crap and I am having problems with my fuel delivery. It is running really rich and my emissions are real high according to my inspection that just failed. I tried to locate my Mass Air Flow sensor to clean it. I cant find it. I called my mechanic up and asked him where it was. He said it does not have one. Is it possible for my Truck to not have a MAF.

It is a 1992 Ford F150. With a 1995 302 V8 5.0L.


Thanx for all your help.

Response From way2old

If it is a 92, it will not have a MAF. It probably has a MAP sensor. Click here for some information.

Response From ford91486 Top Rated Answer

Ok That makes perfect sence. I am replacing the MAP. I wasnt sure if I should have both the MAP and MAF.

1995 Nissan Maxima stalls and sputters

Showing 3 out of 5 Posts | Show 2 Hidden Posts
Question From krbucks1 on 1995 Nissan Maxima stalls and sputters

I have a 1995 Nissan Maxima GXE 3.0 V6 180,000 miles. The car will stall at a stop or when preparing to turn as the RPMs drop below 1000. The car will also sputter slightly at 2200 rpms when driving down the highway. It does not do this all the time and it sometimes will go a few days with out this problem. I have replaced ignition coils, idle air control valve, and oxygen sensors. I have also cleaned the mass air flow sensor. I am currently thinking about replacing the mass air flow sensor but know it is a pricey part to do so with.

Response From Sidom

That's a pretty steep guess if you're wrong. A lot of times cleaning a MAF will make some kind of difference if it's the problem...

I noticed you posted a problem happening at "under 1000 rpms". Normally you should be able to go to 400 or 500 with out the engine dying. I would make sure there isn't any vacuum leaks and the secondary ignition is in good shape....

Is the check engine light on? If so get the codes pulled.....

Response From krbucks1

Cleaning it made no difference but I will try that again. The check engine light is not on. The optimum idle RPM is suppossed to be arounfd 650. It hovers around that before stalling out.

Response From Sidom

When you redo the MAF get a can of throttle body cleaner and clean the throttle body as well...... get a little brush open up the throttle plate by hand, spray some cleaner down there and clean it real good. Start it every so often so it doesn't flood out. You can even spray some down there while running it & feathering the throttle to keep it running.....

They make special cleaner for the MAF sensors, hopefully you were using that & not carb clean....


Response From krbucks1 Top Rated Answer

That's what I used. I will definately try cleaning the throttle body. Thanks.

Map sensor

Showing 2 out of 2 Posts
Question From redredeye on Map sensor

where is the MAP sensor located on a 1991 3.8L buick

Response From Hammer Time Top Rated Answer

It doesn't have one. It uses a Mass Air Flow sensor.

mass air flow sensor

Showing 3 out of 8 Posts | Show 5 Hidden Posts
Question From Guest on mass air flow sensor

2003 chevy 3500 express van
6.0 vortec engine
125,000 miles

would I get a code for a bad air flow sensor or would I just get the symptoms of having a bad one.

and could one of the symtoms be running lean. I am trying to troubleshoot this problem and this was just a lead I

got. My main problem is truck will start and run fine then check engine light comes on truck will then run rough

(misfires), then the truck will correct itself and run fine again. this will happen through out the day. The truck is running or idling for 5-8 hours a day

Response From Guest

You can get a specific failure code for a MAF if it fails out of range but it can also fail within parameters & not set MAF specific codes but other related codes.

I didn't notice any codes in this thread so I'm not sure what you are getting... Some usually within parameter codes you can get are P0171 & P0174 lean bank 1, lean bank 2, but there are alot, alot of things that can set those codes...

Intermittens can be tricky to find. You got some good advise... along with the codes is the freeze frame data that stores when a code sets.... that will tell you the driving conditions when the codes sets & help duplicate the conditions.

sounds like you've already replaced some parts & so hopefully your tech has already check the TSBs & your calibration code of the PCM to make sure it has the most current flash...

I've seen some drivability probs solved with just a simple updated reflash....

Response From Loren Champlain Sr

Computers are great, but we can't rely on them 100%. They don't always catch every hiccup. We've fixed many
MAF sensors by just cleaning them. I'm not sure if yours is accessable or not. Are you losing injector pulse when the problem occurs? Yes, a lean or a rich condition can cause your symptoms. It also can get very expensive throwing parts at it, as you probably already know. Sometimes, no most always, it is cheaper in the long run to have a tech diagnose it for you. You can still do the repairs, but...

Response From Guest

loren,

the problem is my highly paid mechanic seems to be guessing too. Costing me not only parts but labor. Just wanted to know if my map was bad would I get a code for it or just symptom codes?

Response From Loren Champlain Sr

Generally speaking, you would get a code. If your tech can catch it while it is acting up, he should be able to watch live data on his scanner. Sometimes (and I stress, sometimes) you can tap on the MAF with the plastic handle of a screwdriver and get them to act up (if faulty), but not always. There are so many things that could be causing a problem. Can the tech take it for a drive, maybe with you driving, so he can watch the scan data?
Intermittent problems can be a real nightmare to find. Good luck.

Response From Guest

Intermitten, I'll say. This is a work truck and is used for a route, It must run everyday. Let it idle for 2 hours trying to get the check engine light on, of course would not come on. Go to work next day 15 minutes in the light pops on. I am loosing my mind.

Response From Loren Champlain Sr Top Rated Answer

Ah, don't feel bad. At least you have some brain cells left to lose. Mine's been gone for years. LOL. Have a great Sunday.

Response From Jeff Norfolk

There should be some miss fire data in the scan tool if the light is coming on and running bad. I wounder if there is any miss fire codes present when the MAF code is there. MAF code could be a secondary code to the miss fire. At the same time the miss could be a secondary symptom due to the MAF With the miss fire data in the scan tool, you mechanic should be able to see if the miss is cylinder specific or just random. If it is cylinder specific then that really leaves three things that are causing it. Either way the MAF may be tripping a code due to the miss. It may be metering to compensate for the miss and going out of the desired range. Just a side note I have replaced injector #6 a handful of times for this very described problem. Obviously there was a diagnosis involved in these repairs, but #6 none the less each time.