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Old 07 January 2018, 08:39 PM
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Hawkins 1995
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hi I had a p0103 code come up which is the maf sensor just wondering dose the maf need cleaning or just need to be replaced
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Old 07 January 2018, 11:05 PM
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Originally Posted by Hawkins 1995
hi I had a p0103 code come up which is the maf sensor just wondering dose the maf need cleaning or just need to be replaced
Its a high volume code.
Doesn't necessarily need replaced but you've not given much information.

What mods have you fitted to the car. Is it mapped, Have you fitted anything recently ?
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Old 08 January 2018, 12:23 AM
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Originally Posted by rob84
Its a high volume code.
Doesn't necessarily need replaced but you've not given much information.

What mods have you fitted to the car. Is it mapped, Have you fitted anything recently ?
Cars running 396bhp Mods are
Td0520g hybrid turbo Perrin inlet pipeEcutek remapNGK 7 plugsWalbro 255 fuel pumpHKS mushroom filterHKS BOV3" stainless turbo back exhaust (H+S) Vortex afterburner back box
Nothing fitted recently and yeah high volume imput
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Old 08 January 2018, 01:34 PM
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Wasn't this mapped recently ?
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Old 08 January 2018, 02:05 PM
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Engine-Codes OBDII
Code List P0103 SUBARU
P0103 SUBARU -

Mass or Volume Air Flow 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
What does this mean?
Tech notes 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.
What does this mean?
When is the code detected?
An excessively high voltage from the sensor is sent to Engine Control Module (ECM). Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Engine stall Engine running rough Excessive fuel consumption Excessive smoke

However the above issues may be due to a remapping to gain extra BHP..
Last edited by The Trooper 1815; 08 January 2018 at 02:07 PM.
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Old 08 January 2018, 04:39 PM
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Originally Posted by mervil
Wasn't this mapped recently ?
1k miles ago
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Old 08 January 2018, 04:41 PM
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Originally Posted by The Trooper 1815
Engine-Codes OBDII
Code List P0103 SUBARU
P0103 SUBARU -

Mass or Volume Air Flow 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
What does this mean?
Tech notes 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.
What does this mean?
When is the code detected?
An excessively high voltage from the sensor is sent to Engine Control Module (ECM). Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) Engine stall Engine running rough Excessive fuel consumption Excessive smoke

However the above issues may be due to a remapping to gain extra BHP..
The map was 1k miles ago most probably just drity so just reset it for know if it comes back on I'll get some cleaning for it
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Old 08 January 2018, 06:32 PM
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Use an electrical no residue cleaner, not brake cleaner.


Carb cleaner not sure, I use electrical cleaner to be safe on sensitive things like a MAF.
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Old 08 January 2018, 07:29 PM
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Originally Posted by Hawkeye D
Use an electrical no residue cleaner, not brake cleaner.


Carb cleaner not sure, I use electrical cleaner to be safe on sensitive things like a MAF.
Cheers mate was going to use maf cleaner if it come up again see what happens
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Old 08 January 2018, 08:28 PM
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I'd bin the HKS filter and replace with a better filter. One of the lads got through 4 maf sensor in a weekend whilst running one of these

http://www.shinny.co.uk/toyota/Air%2...hoot%20Out.pdf
or
http://mkiv.com/techarticles/filters_test/2/index.html
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Old 08 January 2018, 09:22 PM
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Originally Posted by DannyBoy007
I'd bin the HKS filter and replace with a better filter. One of the lads got through 4 maf sensor in a weekend whilst running one of these

http://www.shinny.co.uk/toyota/Air%2...hoot%20Out.pdf
or
http://mkiv.com/techarticles/filters_test/2/index.html
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Old 08 January 2018, 11:15 PM
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Originally Posted by DannyBoy007
I'd bin the HKS filter and replace with a better filter. One of the lads got through 4 maf sensor in a weekend whilst running one of these

http://www.shinny.co.uk/toyota/Air%2...hoot%20Out.pdf
or
http://mkiv.com/techarticles/filters_test/2/index.html
Don't think it would be the hks tbh it's been on there year I will change it to a maf less induction when I do my 2.1 stroker build
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Old 09 January 2018, 11:32 AM
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Originally Posted by Hawkins 1995
Don't think it would be the hks tbh it's been on there year I will change it to a maf less induction when I do my 2.1 stroker build
But that was before you increased the demand to the engine with the remap.
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Old 09 January 2018, 07:33 PM
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It's a dry bitty filter... little bits break off and can damage the maf especially after upping the boost
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Old 10 January 2018, 10:19 AM
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Originally Posted by mervil
It's a dry bitty filter... little bits break off and can damage the maf especially after upping the boost
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Old 12 February 2018, 01:11 AM
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Just any update since cleaning the maf and resetting the code after 1000 miles the light still hasn't come back on happy days 😊
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Old 30 March 2018, 06:47 AM
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Had the problem come back turned out to be the pcv in the end
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