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

error codes

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Old Jul 3, 2011 | 05:46 PM
  #1  
Xunaria's Avatar
Xunaria
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Joined: Jun 2011
Posts: 7
From: Maryland
Default error codes

getting error codes on a V6 stang I acquired that apparently the previous owner never took care of

p0171
p0420

I cleaned the throttle body and replaced the air filter that looked like it hasnt been replaced since it left the lot 11 years ago. The performance seems ok, kinda sluggish uphill but the Gas mileage sucks really bad. Could it be the MAF sensor that needs cleaning? since the filter and throttle body was black and all.
Im hoping it isnt the catalytic converter like a P0420 usually ends up being, would be much happier if its just an O2 sensor/MAF cleaning. What do you guys think? mainly to fix my gas mileage/pass emmissions
Old Jul 4, 2011 | 06:14 PM
  #2  
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petrock
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Joined: Nov 2006
Posts: 1,669
From: CA
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http://www.obd-codes.com/p0171
http://www.obd-codes.com/p0420
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