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| Engineering/Technical Ask technical questions about cars. Do you know how a car engine works? |
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07-03-2007, 08:20 PM
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AF Newbie
Join Date: Jul 2007
Location: fresno, California
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1995 mustang
went to smog my 1995 3.8 mustang and it failed could someone please tell me what this code mean P0102 MAF or VAF CKT Low Input and P0172 System to Rich (Bank 1) help
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07-03-2007, 09:50 PM
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#2 | |
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AF -Advisor
 Join Date: Feb 2006
Location: Seattle, Washington
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Re: 1995 mustang
P0102 sets when the MAF sensor is outside of the expected parameters. Voltage is low. Could be the car was started with the sensor disconnected, the snorkel has a hole in it, or has a leak at the clamp (loose), or a hose is off of the snorkel.
Lastly, the MAF could be bad or dirty. The P0172 could be a symptom of the first code, although usually its a lean code, not a rich code. Basically its telling you the computer had to correct the fuel trim further than parameters allow (25% plus or minus). A bad MAF, or leak at the snorkel can definitely set fuel trim codes. If you want a shotgun suggestion, after verifying the snorkel between the MAF and the intake manifold is air tight with no leaks, replace the MAF....but they aren't cheap
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