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Check engine light comes on and then off again. Codes 302,
Check engine light comes on and then off again. Codes 302, 171 … read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
1,994 satisfied customers
Have a 2000 F150 5.4. Just replaced intake manifold, mass
Have a 2000 F150 5.4. Just replaced intake manifold, mass air sensor, IAC, TPS and most of the vacuum hoses. Getting Bank 1 & 2 to lean errors, not much left to replace? … read more
Joshua Haynes
Joshua Haynes
Associate
274 satisfied customers
1996 ford: 1 ton dually and the check engine light light comes..lean
I have a 1996 ford 1 ton dually and the check engine light light comes on with codes 171 & 174 and i keep shutting off but it keeps returning and i know that it lean on left & right banks but how do i… read more
Mat
Mat
Ford Senior Master Technician
Associate Degree
956 satisfied customers
2003 f150: p0171 sytem to lean bank 1. code reads p0174 system
2003 f150 code reads p0171 sytem to lean bank 1. code reads p0174 system to lean bank 2 what do i do fix this problem.… read more
Richard
Richard
ASE Certified Technician
Vocational, Technical or Trade Scho
1,535 satisfied customers
98 ford F150: with 5.4 engine..check engine light on code 171 .
I have a 98 ford F150 with 5.4 engine. check engine light on code 171 . no one seems to know what the problem is. have replaced o2 sensors and map sensor to no avail. any help would be greatly appreci… read more
Tim West
Tim West
Service Manager
Computer/ Automotive certifications
16 satisfied customers
97 f150: obd..system adaptive feul to lean bank 1 and 2..evap system
I have a 97 f150 with a 4.2 the obd is telling me system adaptive feul to lean bank 1 and 2 what would cause this also evap system what would be a good starting point to diagnose its problem… read more
Scott
Scott
Diesel, Automatic trans, full line tech
Associate Degree
3,861 satisfied customers
F150: My diagnostic tool indicated that my service soon light..PO171
My diagnostic tool indicated that my service soon light was referring to the numbers PO171 and PO174. My truck is a F150. Would you please tell me what specific part or parts need to be replace or ser… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
ford f150: 2003 4-6 check eng light keeps come..lean..itso dies..idel
i have a ford f150 2003 4-6 check eng light keeps come on codes 171 173 come up.to lean on banks i and2. itso dies whin idel.replace ox sencers. but did no help it.… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
96 lincoln: lean..different ecm,maf sensor,thermostat
96 lincoln cont. 4.6I have 2 codes,0171&0174 which are lean running. I had new intake gaskets,new injectors computer sensor.They tried different ECM,MAF sensor,thermostat. Any suggestions… read more
Dennis
Dennis
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Vocational, Technical or Trade Scho
758 satisfied customers
97 ford expedition: with a 4.6 codes 171 and 174 present
I have a 97 ford expedition with a 4.6 codes 171 and 174 present what is the most likey cause Thanks! Donk… read more
Eric
Eric
Retired
N/A
37,390 satisfied customers
1996 Ford Taurus: The catalytic converters..red hot..leaks..too lean
The catalytic converters on my 1996 Ford Taurus were changed and I was told by the mechanic they turned red hot on checking them for leaks. I was told the car is running too lean. Can you tell me what… read more
Richard
Richard
ASE Certified Technician
Vocational, Technical or Trade Scho
1,535 satisfied customers
Tune..hoses..truck started rough idle and jerks sometimes in overdrive
i had a total tune up , new hoses, plugs one year ago, truck started rough idle and jerks sometimes in overdrive. I replaced a pcv hose. it is coding with 1131 and 1151 codes and 171 and 174 codes and… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
98 windstar: Hello I am getting codes 171 & 174..too lean
Hello I am getting codes 171 & 174 on a 98 windstar. System (adaptive fuel) too lean, (Bank 1 & bank 2). Its got approx. 140,000 on it. Its been fairly well maintained. Where is the best place to star… read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
1,994 satisfied customers
1998 F150: two engine codes being capture by a OBD II Scanner P1131 /
I have a 1998 F150 with two engine codes being capture by a OBD II Scanner P1131 / P1151 any tips on a target area to investage would be greatly appreciated.… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
98 Expedition: It idles really rough but runs good..speeds..rpms drop
I have a 98 Expedition. It idles really rough but runs good at normal speeds. However if the speed is slow enough that the RPM's drop down to 1200 to 1500 it seems to kind of surge. It keeps throwin t… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
97 ford explorer: 5.0L engine diagnostic code says..running lean
97 ford explorer with 5.0L engine diagnostic code say's that bank 1 running lean what should i look for?… read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
1,994 satisfied customers
2001 Ford: clattering..the codes show left bank is running lean
Why is my 2001 Ford F-150with a 4.2 clattering? I changed the plugs and the codes show left bank is running lean. What will fix this?… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
31,725 satisfied customers
F150: V6..check engine light that shows lean mixture..fuel filter..psi
I have an F150 (97) with the 4.2l V6. I have check engine light that shows lean mixture on both banks (2 sepatate codes). I have changed the fuel filter, and run fuel press check that shows about 35 p… read more
Fordanswerman
Fordanswerman
Ford Senior Master Technician retired
Associate Degree
3,304 satisfied customers
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Meet the Experts:

Ron

Ron

ASE Certified Technician

26,187 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

31,725 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Mike V.

Mike V.

Auto Service Technician

1,994 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

Richard

Richard

ASE Certified Technician

1,535 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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