Question about 2005 Ford Freestyle

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Need definition of trouble codes for 05 ford freestyle codes are p0174 p016B p0171 p2106

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P0171 is a lean code,,for bank number 1 p0174 same thing but for bank number 2
P016B - Closed Loop Air/Fuel Ratio Control at Limit - System Too Rich p0176 flex fuel sensor (ouch , they are expensive ) as far as the 2106 code, this is a messy one,, its some sort of internal Ford code that has to do with the throttle body , Ive read numerous forums on this code,, and It usually shows up with others that match ,, yours doesn't seem to coincide with that,, if your in a town with a autozone, they will check your codes for you and have the breakdown of them in each store

Posted on Aug 03, 2010

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I have a 96 ford taurus lx station wagon. I had 2 codes pop up p0171 and p0174 i found a vacuum leak with the pcv hose and replaced it im trying to break loose my O2 sensors to clean them and also change...


oxygen sensors can't be cleaned. They're porous. If they're silled with soot, you have to replace them. Plus, O2 sensors don't caused lean codes, they only report them. Stop looking at the oxygen sensors and look for a vacuum leak, low fuel pressure or clogged fuel injectors.

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P0300 - random misfire , P0171 & P0174 lean code's . All of this means you could have a bad vacuum leak ,low fuel pressure ,clogged fuel filter , Mass air flow sensor problem .
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I suggest check the easy things first. Vacuum lines, could cause a lean condition, fuel filter restricting the fuel flow lean condition. Carefully clean throttle body with proper cleaner. I'm a shade tree mechanic but these simple things work sometimes. You didn't mention if you have the cvt trans. If you do and you are going 75 80 on the highway coming to a hill will cause it to race that high. Then when the hill is crested it will slow down, I don't like it either but it is the nature of the beast. I often cancel the cruise on big hills on the highway so it doesn't do that.

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What are the probable causes of DTCs P0171, P0174, and P0455?


Smoke testing for codes P0171 P0174 - YouTube

? 5:48
www.youtube.com/watch?v=kZsqEfP-5zM
Jan 18, 2011 - Uploaded by realfixesrealfast Smoke testing for codes P0171 P0174 .... I have a 1995 ford mustang gt 5.0 and it keeps having a Fault code 176 pop up. ....Ford Explorer P0174 code intake air leak check engine light by froggy - Duration: 16:11. by froggy ...

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1 Answer

Codes- P0171, P0174, P2106, P0351, P0355 and P061C the car is a 2006 ford five hundred. The car runs good at times. any suggestions?


P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
P2106 Throttle Actuator Control System - Forced Limited Power
P0355 Ignition Coil "F" Primary/Secondary Circuit
May be your car run normally now, but you must check and repair the fault in advance.
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1 Answer

I have replaced the port seals, isolater bolts, cleaned the EGR ports, plugs and wires, and chanced the air filter. I was getting both 171 and 174 codes. Now after 60 miles or so, pulled the codes again...


P0171 is a lean fuel condition . The computer reflashed has nothing to do with it . Vacuum leak intake manifold probably . If both P0171 & P0174 were back could be fuel pump low flow or restricted fuel filter . or O2 sensor problem or mass airflow sensor. Suggest you take it to a qualified repair shop to have it diagnosed .
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CVT Transmission oil change


have 05 freestyle trouble code p2106 came up dealer said it was eletronic throttle body what is this part

Jan 29, 2010 | 2005 Ford Freestyle

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