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I'm reading a p1401, p0305, p0171 and p0174 1997 f157 5.4
Hi, I'm reading a p1401, p0305, p0171 and p0174 1997 f157 5.4 v8 … read more
Paul M ASE Master
Paul M ASE Master
Automotive College
5,412 satisfied customers
I didn't pass the emission test because of these codes. Can
I didn't pass the emission test because of these codes. Can you tell what are these codes. p0156,p0171,p0174,p0301,p0303,p0304,p0305,p1131,p1151 … read more
AutoDoc1
AutoDoc1
High School Diploma
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99 F350 SuperDually with v10 2150, 99 F350 Super Dually with
99 F350 Super Dually with v10 215k miles. Was running rough, would overheat under mild load, MPG went from 10 to 7, had a ping during acceleration. Then the sparkplug in the no. 4 cylinder blew out. ODBII reader showed P1401, P0171, P0300, P0307, and P0174. I fixed the spark plug using a heli coil. I replaced the thermostat and flushed the radiator, replaced the spark plugs, coils, fuel and air filters, and fuel injectors. ODBII reader showed P1401, P0171, and P0174. Replaced the DPFE sensor, and the hoses going to the DPEF, EGR valve, fuel pressure regulator, and MAF sensor.. I took a full can of break cleaner and emptied it by spraying every connection and seam in the engine compartment no apparent vacuum leaks. The MPG went up to 11. ODBII reader showed P0455, P0171, and P0174 Replaced 3 oxygen sensors (single CAT and exhausts), fuel pump (fuel gage did not work anyway), fuel cap, both rubber hoses connected to the fuel tank (looks like evap lines), and 3 rubber hoses that connect the solid lines on the frame to the engine (looks like evap lines). ODBII reader showed P0455, P0171, and P0174. I have checked and cleared the OBDII several times during this process. ODBII reader still reads P0455, P0171, and P0174. I have used 2 tanks of gas during this trouble shooting process. I am at a loss what to do next about the lean codes. … read more
Mike S.
Mike S.
Vocational, Technical or Trade Scho
8,584 satisfied customers
Ron. I have a 2007 chevy Silverado 1500 4x4 with a 5.3l
Hi Ron. I have a 2007 chevy Silverado 1500 4x4 with a 5.3l engine. someone has been into this motor and done some repairs, including a new throttle body. it wants to idle high all the time, it runs at… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
26,642 satisfied customers
A pre-diagnostic/diagnostic reading at local auto zone shows
A pre-diagnostic/diagnostic reading at local auto zone shows a faulty vacuum hose, fuel system to lean, and cylinders 3 and 5 misfiring … read more
A. Penland
A. Penland
Ford Senior Master Technician
Vocational, Technical or Trade School
8,043 satisfied customers
I have 2004 ford 150 4x4 5.4l. I was at the dump and
Hello - I have 2004 ford 150 4x4 5.4l. I was at the dump and when I finished unloading I started the truck and I smelled a little electrical burn smell. I started up and drove off... The chck engine l… read more
Ironmike
Ironmike
ASE Master ,Ford Certified Master Tech
Vocational, Technical or Trade Scho
3,475 satisfied customers
PO300 and PO174 codes on and when i go to pass someone trucks
PO300 and PO174 codes on and when i go to pass someone trucks just doesn't respond. runs bad at when giving it throttle. changed air breather, vacuum hoses. no change… read more
Alex
Alex
Automotive Technician
Associate Degree
1,243 satisfied customers
My Ford Expedtion 2003, 4.6 4wd, 96K miles . misfires and runs rough.
My Ford Expedtion 2003, 4.6 4wd, 96K miles . misfires and runs rough. at first intermitently and now constantly. I started with codes P0174 and P0171 Running lean. I've replaced both catalytic convert… read more
Kenny Z.
Kenny Z.
Ford Senior Master Technician
High School or GED
6,798 satisfied customers
1998 Ford F150: V6..misfiring..the manifold that has a hole in it (
I have a 1998 Ford F150 V6. It is starting to run rough, like it is misfiring. I found an elbow under the manifold that has a hole in it (at the bend). Does anyone know what the part number for this e… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
26,642 satisfied customers
2001 Explorer: V6..lean..P0305 for #5 and 6 cylinders..runs good
2001 Explorer, 4.0 liter V6. I keep getting P0171 and P0174 codes (lean mixture banks 1 and 2), a P0455 code showing a leak in the evaporative emission system ("says large leak"), and sometimes misfir… read more
Ironmike
Ironmike
ASE Master ,Ford Certified Master Tech
Vocational, Technical or Trade Scho
3,475 satisfied customers
98 Ford Expedition: P0171..Error codes..the MAF + oxy sensors
98 Ford Expedition - P0171, P0174, P1131, and P1151 Error codes with a P0102. I just changed the MAF + oxy sensors and to no avail. What else?… read more
CTFordTech
CTFordTech
Auto Technician
Vocational, Technical or Trade Scho
4,894 satisfied customers
95 ford ranger: plug...fire #5 Misses when it warms up fades
I have a 95 ford ranger 3.0 Miss fire #5 changed plug. when changed wire made it worst. code say miss fire #5 Misses when it warms up fades away aprox.60%. Cold its really bad… read more
Tim West
Tim West
Service Manager
Computer/ Automotive certifications
16 satisfied customers
96 f150 4.9l, how do i troubleshoot a p0385 code(misfire sensor
96 f150 4.9l, how do i troubleshoot a p0385 code(misfire sensor curcuit malfunction b) ? ive already changed the sensor, whats next?… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
11,778 satisfied customers
98 Ford Expedition 4x2: 5.4L..Triton..Its idling rough after it warms
I have a 98 Ford Expedition 4x2 5.4L Triton engine. It's idling rough after it warms-up. Check engine light it's on. The scanner showed a P0171 and P0174. I changed all four O2 sensors, the MAF and on… read more
Richard
Richard
ASE Certified Technician
Vocational, Technical or Trade Scho
1,550 satisfied customers
2003 Explorer 4x4: 4.0L flex fuel sohc..mis fires..running rough..o2
I have a 2003 Explorer 4x4 4.0L flex fuel sohc. Been having problems with mis fires and the engine chugging, running rough. I've put new plugs and wires, and replaced an O2 sensor(bank 2 sensor 1) the… read more
Mark W
Mark W
Associate Degree
92 satisfied customers
99 Ford Explorer: lean..o2 sensor..It boggs down and dies, it misfires
My 99 Ford Explorer is running to lean, the computer says, so I changed the o2 sensor and it is still running horrible. It boggs down and dies, it misfires. How do I fix it??… read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
2,274 satisfied customers
2001 ranger: liter 4x4 i have a hard mis, i..p0171..p0174
on my 2001 ranger 4, liter 4x4 i have a hard mis, i get the codes, p0171, p0174, which says system too lean, and p0300 which is random misfire/ multple misfire, where do i begin? multiple plugs or wir… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
26,642 satisfied customers
1999 Ford Contour: V6..Mechanics believe intake leak..Stalls..car runs
1999 Ford Contour V6 Codes P0300,P0301,P0306 P0171,P0174 P01000,P0731 Mechanics believe intake leak,Lower and upper seals leaking.Or possible Wires and spark plug problem. Stalls and wont maintain low… read more
HDGENE
HDGENE
8,291 satisfied customers
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Ron

Ron

ASE Certified Technician

26,642 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

32,873 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

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19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

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

Cam

Cam

Journeyman Automotive Technician

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GM Grand Master Technician 2007. 14 years Automotive experience.

Mike V.

Mike V.

Auto Service Technician

2,274 satisfied customers

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

Richard

Richard

ASE Certified Technician

1,550 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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