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P0171 Diagnostic Trouble Code Discussion for December 2004

Fuel System Lean (Bank 1)


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Trouble Ticket Help Requests for DTC P0171
Help Request Posted
1999 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5142X
P0171: system too lean bank 1. Hello! Problem started a couple of months ago. Customer complaint was MIL light on. Scanned it, found the 2 codes, no other problems were noticed. I did a KOEO, KOER with no trouble and cleared codes. Customer had not noticed any running problems, only MIL on....
December 07, 2004
1998 Honda Accord EX 2.3L Excessive Emissions VIN: 1HGCG5650W
P0171: Fuel System Too Lean (Bank 1). Hi everyone. This gal's cat failed shortly after she accidently put diesel fuel in her tank. I replaced it with a known-good factory cat and about a year later here it comes again with low cat efficiency. Owner's husband smelled sulphur/egg smell in the garag...
December 10, 2004
2002 Saturn Vue 3.0L MIL Lamp on, lean code VIN: 5GZCZ63B12
P0171: Fuel Trim System Lean (Bank 1). engine running lean both banks. snap throttle test shows switching of front sensors followed by post sensors. system then returns to lean. vehicle drives fine and no other problems. not up to speed on saturns. thanks in advance for any help.
December 10, 2004
1997 Ford Explorer XL 4.0L MIL Lamp on VIN: 1FMDU34X5V
P0171: sys too lean bank-1. Prolbem #1 p0171 & p0174 both banks to lean. And I Seem to have a small lean missfire at idel any temp. I looked for vac leaks, not seen yet. Since both banks are lean by code, I was thinking it could be a vac leak. Where could this vac leak be on a 4...
December 14, 2004
1997 Ford Explorer XL 4.0L MIL Lamp on VIN: 1FMDU34X8V
P0171: system to lean. the car came in with code po171 ,stft1 and 2 both at -100.o2 sensors both read 0 volts .ltft 1 and 2 both at -100. maf sensor working and i cleaned it as well.i spray carb cleaner into intake but no chage to o2 sensors,i have disconnected battery but as soon a...
December 15, 2004
1999 Ford Contour LX 2.5L Stall VIN: 1FAFB66L1X
P0171: Bank 1 lean. this car came in on a cold day, complaining that they couldn't keep it running. I was able to but had to keep foot on gas, Had PO171,174 codes. tuned up & weather warmed up, was OK for a week and a half. now its cold again & It's back. Fuel pressure is...
December 15, 2004
1997 Ford Explorer XL 4.0L MIL Lamp on VIN: 1FMDU34X8V
P0171: system to lean. the car came in with code po171 ,stft1 and 2 both at -100.o2 sensors both read 0 volts .ltft 1 and 2 both at -100. maf sensor working and i cleaned it as well.i spray carb cleaner into intake but no chage to o2 sensors,i have disconnected battery but as soon a...
December 16, 2004
1999 Ford Contour SE 2.0L MIL Lamp on VIN: 1FAFP6633X
P0171: system lean. ... setting the check engine light with P0171 code. Have checked everything I can think of. The PCV hose at bottom of intake was collapsed shut, so it was repaired. H02s is working fine. The Baro was high (157) so after replacing MAF sensor I drove it and it c...
December 20, 2004
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMDA5247X
P0171: B1 lean. This Vehicle continually sets P0171 and P0174 both banks lean, Vehicle runs fine, no gas milage complaint, we have tested for vacuum leeks, checked MAF and MAF plumbing, Fuel pressure 36 PSI regulator connected and 44 regulator disconnected, we are stumped on ...
December 27, 2004
1999 Ford Windstar LX 3.8L MIL Lamp on VIN: 2FMZA5142X
P0171: system too lean bank 1. Hello! Problem started a couple of months ago. Customer complaint was MIL light on. Scanned it, found the 2 codes, no other problems were noticed. I did a KOEO, KOER with no trouble and cleared codes. Customer had not noticed any running problems, only MIL on....
December 07, 2004
1998 Honda Accord EX 2.3L Excessive Emissions VIN: 1HGCG5650W
P0171: Fuel System Too Lean (Bank 1). Hi everyone. This gal's cat failed shortly after she accidently put diesel fuel in her tank. I replaced it with a known-good factory cat and about a year later here it comes again with low cat efficiency. Owner's husband smelled sulphur/egg smell in the garag...
December 10, 2004
2002 Saturn Vue 3.0L MIL Lamp on, lean code VIN: 5GZCZ63B12
P0171: Fuel Trim System Lean (Bank 1). engine running lean both banks. snap throttle test shows switching of front sensors followed by post sensors. system then returns to lean. vehicle drives fine and no other problems. not up to speed on saturns. thanks in advance for any help.
December 10, 2004
1997 Ford Explorer XL 4.0L MIL Lamp on VIN: 1FMDU34X5V
P0171: sys too lean bank-1. Prolbem #1 p0171 & p0174 both banks to lean. And I Seem to have a small lean missfire at idel any temp. I looked for vac leaks, not seen yet. Since both banks are lean by code, I was thinking it could be a vac leak. Where could this vac leak be on a 4...
December 14, 2004
1997 Ford Explorer XL 4.0L MIL Lamp on VIN: 1FMDU34X8V
P0171: system to lean. the car came in with code po171 ,stft1 and 2 both at -100.o2 sensors both read 0 volts .ltft 1 and 2 both at -100. maf sensor working and i cleaned it as well.i spray carb cleaner into intake but no chage to o2 sensors,i have disconnected battery but as soon a...
December 15, 2004
1999 Ford Contour LX 2.5L Stall VIN: 1FAFB66L1X
P0171: Bank 1 lean. this car came in on a cold day, complaining that they couldn't keep it running. I was able to but had to keep foot on gas, Had PO171,174 codes. tuned up & weather warmed up, was OK for a week and a half. now its cold again & It's back. Fuel pressure is...
December 15, 2004
1997 Ford Explorer XL 4.0L MIL Lamp on VIN: 1FMDU34X8V
P0171: system to lean. the car came in with code po171 ,stft1 and 2 both at -100.o2 sensors both read 0 volts .ltft 1 and 2 both at -100. maf sensor working and i cleaned it as well.i spray carb cleaner into intake but no chage to o2 sensors,i have disconnected battery but as soon a...
December 16, 2004
1999 Ford Contour SE 2.0L MIL Lamp on VIN: 1FAFP6633X
P0171: system lean. ... setting the check engine light with P0171 code. Have checked everything I can think of. The PCV hose at bottom of intake was collapsed shut, so it was repaired. H02s is working fine. The Baro was high (157) so after replacing MAF sensor I drove it and it c...
December 20, 2004
1999 Ford Windstar SE 3.8L MIL Lamp on VIN: 2FMDA5247X
P0171: B1 lean. This Vehicle continually sets P0171 and P0174 both banks lean, Vehicle runs fine, no gas milage complaint, we have tested for vacuum leeks, checked MAF and MAF plumbing, Fuel pressure 36 PSI regulator connected and 44 regulator disconnected, we are stumped on ...
December 27, 2004