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04 grand am surging,replaced maf sensor


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klift1
New User

Oct 29, 2012, 2:17 PM

Post #1 of 8 (1704 views)
04 grand am surging,replaced maf sensor Sign In

I have replaced gas cap and MAF sensor. Reset light with scantool. still shows low air flow. Checked for vac leaks on hoses. Changed plugs and wires, no change. Possible emission control problem? still surging from 650-725 rpm, trans shifting hard at same time light came on. No other codes show up.


Hammer Time
Ultimate Carjunky / Moderator
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Oct 29, 2012, 3:04 PM

Post #2 of 8 (1678 views)
Re: 04 grand am surging,replaced maf sensor Sign In

What is the exact code number PO401 maybe?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



klift1
New User

Oct 29, 2012, 3:15 PM

Post #3 of 8 (1671 views)
Re: 04 grand am surging,replaced maf sensor Sign In

The code was P08 low air flow to MAF sensor


Hammer Time
Ultimate Carjunky / Moderator
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Oct 29, 2012, 3:18 PM

Post #4 of 8 (1667 views)
Re: 04 grand am surging,replaced maf sensor Sign In

No such code. One letter with 4 numbers



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



nickwarner
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Oct 29, 2012, 6:04 PM

Post #5 of 8 (1654 views)
Re: 04 grand am surging,replaced maf sensor Sign In

What engine do you have anyway?


Discretesignals
Ultimate Carjunky / Moderator
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Oct 29, 2012, 6:30 PM

Post #6 of 8 (1649 views)
Re: 04 grand am surging,replaced maf sensor Sign In

Maybe P0108?





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Hammer Time
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Oct 29, 2012, 6:36 PM

Post #7 of 8 (1645 views)
Re: 04 grand am surging,replaced maf sensor Sign In

(MAP) Manifold Absolute Pressure/(BARO) Barometric Pressure Sensor -Circuit High
Input


You have a problem with the MAP sensor circuit voltage signal too high, not the MAF and not the EVAP.

That could be a bad sensor, lack of vacuum to the sensor or any of the related wiring.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
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Oct 29, 2012, 6:57 PM

Post #8 of 8 (1640 views)
Re: 04 grand am surging,replaced maf sensor Sign In

It must be a 3.4L because 2.2L(F) doesn't use plug wires.....


Oh wait a minute...let me plug my special scan tool in...LOL








Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Oct 29, 2012, 7:02 PM)






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