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My 1998 f 150 4,2 l has been intermittingly rough idle and
My 1998 f 150 4,2 l has been intermittingly rough idle and now is at time not firing on cyl # 2 with the following codes, po 174 bank 2 , too lean, po 1505 idle overspeed error, po 302 Cylinder number… read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
1,591 satisfied customers
2003 ford f-150 Triton....PO 171 and PO 174 I cleaned the
2003 ford f-150 Triton....PO 171 and PO 174 I cleaned the MAF real good but still have codes. what is the fix for this please. Thanks.… read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
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Check engine codes(###) ###-####155 will not get over 2000
check engine codes(###) ###-####155 will not get over 2000 rpms ran a diagnostic said egr valve error cmd egr 0.0 could this be the problem is EGR Valve is Bad… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
2001 ford windstar: intake..rough idle..highway engine..accelerator
2001 ford windstar codes 171, 174 bank 1 & 2 lean.. replaced MAF sensor did not correct.. still intake backfire, engine rough idle. running on highway engine stays at 2100 RPM with no foot on accelera… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
11,229 satisfied customers
Have codes po 171 & 174 replaced EGR valve..comes back..idles
Have codes po 171 & 174 replaced EGR valve and all vacuum hoses code still comes back and vehicle idles very badly. 2001 Ford escape v6… read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
19,785 satisfied customers
1999 Ford Explorer: Ron..engine light came..an OBD ll Scanner and it
Hi Ron: On the same 1999 Ford Explorer that we bought for our Grandson recently we have a new problem. While he was driving it today the engine light came on. I have an OBD ll Scanner and it pulled up… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
That goes from the exhaust manifold to the egr valve was broken
I have codes 1451, 171, 174. I found that the tube that goes from the exhaust manifold to the egr valve was broken. Do you think this could of caused these code, or should I be looking at something el… read more
Steve
Steve
Ford tech Specializing in electronics
Vocational, Technical or Trade School
6,745 satisfied customers
check engine light..3 codes come up A) po 401 egr Flow Ins...po171
Mine check engine light is on. I have 3 codes come up A) PO 401 EGR Flow Ins. B) PO171 Bank 1 Too Lean C) PO174 Bank 2 Too Lean. What do these maen?… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
11,778 satisfied customers
1996 ford E-250: 4.9L..cylinder..O2 sensor..trouble codes
1996 ford E-250 4.9L 6 cylinder. What is the location of O2 sensor, Right bank sensor 1? Recently pulled trouble codes indicating a bad O2 sensor. There are 2 pipes coming off exhaust manifold that co… read more
lostrider
lostrider
lead technician/working shop foreman
Vocational, Technical or Trade Scho
3,074 satisfied customers
how do you fix a 171 and a 174 obd code on a reader. it sounds
how do you fix a 171 and a 174 obd code on a reader. it sounds like i need new Oxygen sensors… read more
Shawn
Shawn
Self Employed
Vocational, Technical or Trade Scho
360 satisfied customers
Po 171 bank 1 po 174 bank 2 could this..leak..intake manifold
po 171 bank 1 po 174 bank 2 could this have anything to do with a leak in the intake manifold… read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
7,238 satisfied customers
2004 Ford F-150: MIL indicates 171, 174, left and right bank too lean
2004 Ford F-150 with 302, MIL indicates 171, 174, left and right bank too lean. Where would I start to T/S for repair?… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
11,229 satisfied customers
98 Ford Contour: diagnostic..two codes: P0171 and P0708
I have a 98 Ford Contour. I have had an engine diagnostic run resulting in two codes: P0171 and P0708. Sadly, I work at an automotive school and they can't seem to tell me exactly what needs to be rep… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
11,229 satisfied customers
O2 sensor..what is it when it say shift solenoid c ck performance
where is bank 1 and bank 2 o2 sensor, along with how do you you change shift solenoid and what is it when it say shift solenoid c ck performance or stuck off… read more
Kenny Z.
Kenny Z.
Ford Senior Master Technician
High School or GED
6,190 satisfied customers
I have 3 trouble codes on my 97 Tbird LX-V8..lean Bank
I have 3 trouble codes on my 97 Tbird LX-V8. The 1st one is P1443, the other 2 are 171 and 174 which i believe are System too lean Bank 1, and system too lean bank 2. What would cause this and what wo… read more
Kelly (aka) stogie
Kelly (aka) stogie
Vocational, Technical or Trade Scho
2 satisfied customers
Ford Windstar: liter..van with a check engine light..reads
I have a 1998 3.8 liter Ford Windstar van with a check engine light, the error code reads #PO171 - System Adaptive fuel too lean (Bank 1). What would be corrective action for this code?… read more
james
james
Vocational, Technical or Trade Scho
254 satisfied customers
1998 Ford Explorer: liter..000 miles..Check Engine light..driver side
I have a 1998 Ford Explorer with the pushrod 4 liter and 109,000 miles. The Check Engine light was on and my Scan Tool displays trouble codes 171 (Too lean bank 1) ; 174 (too lean bank 2) and 133 (ban… read more
Keith Allen
Keith Allen
AUTO / DIESEL MECHANIC
Vocational, Technical or Trade Scho
116 satisfied customers
1999 Ford F 350: Super Duty..V..10 motor is surging at an idol
1999 Ford F 350 Super Duty 6.8 V-10 motor is surging at an idol in drive. Engine light is on. check engine. Computer said: DTC PO 171 System too Lean (Bank 1) DTC PO 174 System too Lean (Bank2)… read more
LBS Tech
LBS Tech
Ford Technician
Associate Degree
198 satisfied customers
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Meet the Experts:

Ron

Ron

ASE Certified Technician

25,182 satisfied customers

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

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Chris (aka- Moose)

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16 years experience

John Mc

John Mc

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Chuck

Chuck

ASE Certified Technician

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

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Cam

Journeyman Automotive Technician

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Mike V.

Mike V.

Auto Service Technician

1,591 satisfied customers

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

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Richard

ASE Certified Technician

1,524 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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