Question about 2005 Chevrolet Impala

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What do the letters MAF /VAF trouble codes stand for on my 2005 chevy Impala

Check engine light on codes maf/vaf come up what are they and where is it located

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  • Chevrolet Master
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It would probably be helpful to know what the actual codes are. There is a nice website at:
http://www.obd-codes.com/trouble_codes/
...with possible solutions.

MAF = Mass Air Flow sensor
It will be located between the air filter and the throttle body. Maybe remove the engine cover. I recall that you'll need a special torx bit to remove it. You may be able to spray it with MAF cleaner; available at any parts store for $6?.
Remove the large hose clamps from the throttle body, and unclip the air filter cover. Remove the cover and accordion tube. Hopefully, you can see the inner part of the MAF sensor. spray it a little, wait a couple minutes, spray again, wait.... repeat maybe 5 times. You're trying to spray the one or two little wires that look like resistors. When it is clean, it should be nice and shiny. Do NOT touch the "resistors" with anything but the spray. .what do the  letters MAF /VAF trouble codes  stand - 1_10_2013_2_01_08_am.jpg

Posted on Jan 10, 2013

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Posted on Jan 02, 2017

  • 14585 Answers

SOURCE: I have a 2003 Chevy

MAF sensors rarely go bad. 99.5% of the time it is a vacuum leak. Your truck has a MAF , so it doesn't have the VAF

Posted on Aug 11, 2011

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I have a '11 Toyota Camry LE, the VSC, and engine light are on. I have these codes from the local auto parts shop: C1201, P0171, and P0101.


code p 101 refers to mass air flow(MAF)sensor/volume air flow(VAF) sensor --range performance problem====causes --intake leak/blockage---MAF/VAF sensor

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I don't have a listing for the c code but from the other 2 codes I would be checking around the maf/vaf sensors and the HO2S sensor (replace)
start with checking the wiring and connections to both units

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What is code p0101/p0300/p0171


code p0101 refers to MAF sensor and VAF sensor--range /performance problems===causes --intake leakage/blockage ---MAF/VAF sensor failure.

code p0300 refers to random misfires multiple cylinders ---causes --spark plugs /HT leads --injector /s-- ignition coil/ s--low compression ---wiring

check fuel pressure in manifold and HT leads

code p0171 refers to system too lean bank 1 ===causes --intake /exhaust air leak---AIR system---MAF/VAF sensors ---fuel pressure /pump---injectors ---HO2S sensor

Basically there are two codes referring to the MAF/VAF sensors so check them out and two codes referring to fuel pressure and pump so have a pressure test done on the fuel manifold to determine if pump or pressure regulator.

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What does code po102 mean ?


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clean or replace the MAF/VAF senspr

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I would check that the air filter is not blocked first as it affects the MAF/VAF sensors . Have a fuel pressure system pressure test done

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What is vaf


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