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V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

Rich Codes

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Old 06-05-2011, 06:10 PM
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Surge08
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I have a 2000 Mustang 3.8L Automatic with California Emissions.

I have P0172 and P0175. Both banks lean.

Steps Taken

Cleaned MAF Sensor with Carb Cleaner
Cleaned Throttle Body
Replaced Air Filter
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Old 06-06-2011, 08:54 AM
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Surge08
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Anyone?
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Old 06-06-2011, 09:37 AM
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NeoTokyo
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Welcome to MF, sorry about the slow reply.

Here is a site to check out.

http://www.obd-codes.com/p0172

http://www.obd-codes.com/p0175

They are both similar.

Could be a vacuum leak or fuel pressure problem.
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Old 06-06-2011, 01:44 PM
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jwog666
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mass airflow is bad, intake leaks, low fuel pressure all possibilities
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Old 06-06-2011, 06:49 PM
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LilRoush
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Could be O2 sensors reading wrong and messing up your AF ratio.
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