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P0174 Diagnostic Trouble Code Discussion for January 2010

Fuel System Lean (Bank 2)


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Trouble Ticket Help Requests for DTC P0174
Help Request Posted
2001 Toyota Highlander 3.0L Excessive Emissions, Misfire VIN: JTEHF21A91
P0174: Fuel System Too Lean (Bank 2). I've dealt with this code on Toyotas before, this engine utilizes air/fuel sensors, not o2 sensors, but what puzzles me is why the lean codes when the engine is obviously running rich? I mean it has black sooty plugs that were replaced a week ago and already h...
January 06, 2010
2004 Ford F-150 FX4 5.4L Poor Idle Quality VIN: 1FTPW14564
P0174: lean bank 2. cleared codes, cleaned induction system, added 1/2 qt trans fluid to engine and roadtest, only lean/rich codes came back, idles crappy. reset kam and recheck fuel trims, adding fuel and removing fuel on other bank..
January 07, 2010
1998 Ford Explorer Limited 4.0L MIL Lamp on VIN: 1FMZU32E7W
P0174: Lean Bank 2. ... a Code P0171 and a P0174. The fuel pressure is good and the Air Flow Meter Tests Good. I smoked the intake system and found two vacuum leaks that were repaired. When I scaned the vehicle all the Fuel Trims Numbers (Both Short & Long) Show -100.6 % a...
January 08, 2010
2000 Ford Taurus SE 2-Valve 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FAFP53U8Y
P0174: Bank 2 lean. Vehicle came in with CEL on, P0171, P0174. Customer said he replaced the PCV hose assembly because it was leaking. It was replaced and done correctly. Check for vac leaks, found none. Check MAF and baro readings w/ scan tool, everything looks good, cleaned MAF...
January 08, 2010
2000 Ford Taurus SE 2-Valve 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FAFP53U8Y
P0174: Bank 2 lean. Vehicle came in with CEL on, P0171, P0174. Customer said he replaced the PCV hose assembly because it was leaking. It was replaced and done correctly. Check for vac leaks, found none. Check MAF and baro readings w/ scan tool, everything looks good, cleaned MAF...
January 11, 2010
1996 Ford E-150 Econoline 4.9L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTEE14Y6T
P0174: lean bank two. ... day and had a code p0171 p0174 p0300 and p0420. we chose to go for the lean codes first in hopes they would also cure the others. found fuel trims short term maxing out nearly immediately after warm up at 33%. but when the engine is reved to 1500 rpm or mo...
January 15, 2010
2005 Ford Taurus SE 3.0L Poor Idle Quality, Surge, Melted intake VIN: 1FAFP56275
P0174: lean. This vehicle cam in with these codes a week ago. Found holes in the intake (melted) where the pcv hose goes into the upper intake. Also noted extremely hot pcv assembly hose. Checked for restricted exaust, checked ok. Replaced intake and pcv heater, and had a ...
January 15, 2010
1996 Ford E-150 Econoline 4.9L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTEE14Y6T
P0174: lean bank two. ... day and had a code p0171 p0174 p0300 and p0420. we chose to go for the lean codes first in hopes they would also cure the others. found fuel trims short term maxing out nearly immediately after warm up at 33%. but when the engine is reved to 1500 rpm or mo...
January 18, 2010
2003 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B53
P0174: Fuel Trim System Lean (Bank 2). Hello everyone, this Vue came in for state inspect fail(Monitors not ready). We checked for codes, first came up with PO 507 when checked on inspection machine. Drove vehicle and PO 507 came back, plus these other codes. Sprayed carb cleaner down by throttle b...
January 19, 2010
1999 Ford Taurus SE 3.0L Excessive Emissions, MIL Lamp on, Fuel Sytem Lean VIN: 1FAFP53SXX
P0174: Fuel System Lean Bank 2. Ok everyone this one's a killer. This car was brought by a lady who had it at another shop who could not solve this problem. Check engine light is on with bank one and two lean codes. Long term fuel trims at idle hang around 20 to 25. The second you raise the ...
January 21, 2010
1999 Mercury Grand Marquis GS 4.6L MIL Lamp on VIN: 2MEFM74W5X
P0174: System too lean bank 2. Customer had no complaints other than CEL on. Ran codes and got the common 171-174 lean both banks. Did the MAF clean, check vacuum leaks, replace PCV,oem part. Checked for vacuum at crankcase with PCV plugged and no negative pressure. Cleared codes, test drov...
January 24, 2010
2000 Ford Explorer Eddie Bauer 5.0L MIL Lamp on VIN: 1FMZU84P1Y
P0174: fuel system too lean bank 2. ... in advance for your time. This explorer came in to me with the service engine soon light on which had been on for nearly a year. It is time for mass state inspection so it was time that he finally had to get it fixed. I scaned for codes and found p0171 and...
January 26, 2010
2000 Ford Explorer Eddie Bauer 5.0L MIL Lamp on VIN: 1FMZU84P1Y
P0174: fuel system too lean bank 2. ... in advance for your time. This explorer came in to me with the service engine soon light on which had been on for nearly a year. It is time for mass state inspection so it was time that he finally had to get it fixed. I scaned for codes and found p0171 and...
January 27, 2010
2004 Jaguar X-Type 3.0L MIL Lamp on VIN: SAJEA51C84
P0174: Lean Condition - Bank 2. ... help. this clean car came in with codes P0171 & P0174. off idle fuel trims are normal. at idle in park lt fuel trims are both at 18%, idle in drive 19.5%. car idles beautifully and vacuum is 20.5". MAP reads 8.9" - 9.2" (we are just barely ...
January 28, 2010
2006 Nissan Maxima SE 3.5L MIL Lamp on VIN: 1N4BA41E86
P0174: Fuel Trim Lean (Bank 2). ... years. retrieved code p2a03- o2 sensor range/ performance. found fuse number 15 in underdash fuse panel had been removed. installed new fuse. cleared cel. cel came back on with p0420- cat efficency. inspected cats with boros...
January 28, 2010
2004 Jaguar X-Type 3.0L MIL Lamp on VIN: SAJEA51C84
P0174: Lean Condition - Bank 2. ... help. this clean car came in with codes P0171 & P0174. off idle fuel trims are normal. at idle in park lt fuel trims are both at 18%, idle in drive 19.5%. car idles beautifully and vacuum is 20.5". MAP reads 8.9" - 9.2" (we are just barely ...
January 29, 2010
2006 Nissan Maxima SE 3.5L MIL Lamp on VIN: 1N4BA41E86
P0174: Fuel Trim Lean (Bank 2). ... years. retrieved code p2a03- o2 sensor range/ performance. found fuse number 15 in underdash fuse panel had been removed. installed new fuse. cleared cel. cel came back on with p0420- cat efficency. inspected cats with boros...
January 29, 2010
2001 Toyota Highlander 3.0L Excessive Emissions, Misfire VIN: JTEHF21A91
P0174: Fuel System Too Lean (Bank 2). I've dealt with this code on Toyotas before, this engine utilizes air/fuel sensors, not o2 sensors, but what puzzles me is why the lean codes when the engine is obviously running rich? I mean it has black sooty plugs that were replaced a week ago and already h...
January 06, 2010
2004 Ford F-150 FX4 5.4L Poor Idle Quality VIN: 1FTPW14564
P0174: lean bank 2. cleared codes, cleaned induction system, added 1/2 qt trans fluid to engine and roadtest, only lean/rich codes came back, idles crappy. reset kam and recheck fuel trims, adding fuel and removing fuel on other bank..
January 07, 2010
1998 Ford Explorer Limited 4.0L MIL Lamp on VIN: 1FMZU32E7W
P0174: Lean Bank 2. ... a Code P0171 and a P0174. The fuel pressure is good and the Air Flow Meter Tests Good. I smoked the intake system and found two vacuum leaks that were repaired. When I scaned the vehicle all the Fuel Trims Numbers (Both Short & Long) Show -100.6 % a...
January 08, 2010
2000 Ford Taurus SE 2-Valve 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FAFP53U8Y
P0174: Bank 2 lean. Vehicle came in with CEL on, P0171, P0174. Customer said he replaced the PCV hose assembly because it was leaking. It was replaced and done correctly. Check for vac leaks, found none. Check MAF and baro readings w/ scan tool, everything looks good, cleaned MAF...
January 08, 2010
2000 Ford Taurus SE 2-Valve 3.0L Poor Idle Quality, MIL Lamp on VIN: 1FAFP53U8Y
P0174: Bank 2 lean. Vehicle came in with CEL on, P0171, P0174. Customer said he replaced the PCV hose assembly because it was leaking. It was replaced and done correctly. Check for vac leaks, found none. Check MAF and baro readings w/ scan tool, everything looks good, cleaned MAF...
January 11, 2010
1996 Ford E-150 Econoline 4.9L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTEE14Y6T
P0174: lean bank two. ... day and had a code p0171 p0174 p0300 and p0420. we chose to go for the lean codes first in hopes they would also cure the others. found fuel trims short term maxing out nearly immediately after warm up at 33%. but when the engine is reved to 1500 rpm or mo...
January 15, 2010
2005 Ford Taurus SE 3.0L Poor Idle Quality, Surge, Melted intake VIN: 1FAFP56275
P0174: lean. This vehicle cam in with these codes a week ago. Found holes in the intake (melted) where the pcv hose goes into the upper intake. Also noted extremely hot pcv assembly hose. Checked for restricted exaust, checked ok. Replaced intake and pcv heater, and had a ...
January 15, 2010
1996 Ford E-150 Econoline 4.9L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1FTEE14Y6T
P0174: lean bank two. ... day and had a code p0171 p0174 p0300 and p0420. we chose to go for the lean codes first in hopes they would also cure the others. found fuel trims short term maxing out nearly immediately after warm up at 33%. but when the engine is reved to 1500 rpm or mo...
January 18, 2010
2003 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B53
P0174: Fuel Trim System Lean (Bank 2). Hello everyone, this Vue came in for state inspect fail(Monitors not ready). We checked for codes, first came up with PO 507 when checked on inspection machine. Drove vehicle and PO 507 came back, plus these other codes. Sprayed carb cleaner down by throttle b...
January 19, 2010
1999 Ford Taurus SE 3.0L Excessive Emissions, MIL Lamp on, Fuel Sytem Lean VIN: 1FAFP53SXX
P0174: Fuel System Lean Bank 2. Ok everyone this one's a killer. This car was brought by a lady who had it at another shop who could not solve this problem. Check engine light is on with bank one and two lean codes. Long term fuel trims at idle hang around 20 to 25. The second you raise the ...
January 21, 2010
1999 Mercury Grand Marquis GS 4.6L MIL Lamp on VIN: 2MEFM74W5X
P0174: System too lean bank 2. Customer had no complaints other than CEL on. Ran codes and got the common 171-174 lean both banks. Did the MAF clean, check vacuum leaks, replace PCV,oem part. Checked for vacuum at crankcase with PCV plugged and no negative pressure. Cleared codes, test drov...
January 24, 2010
2000 Ford Explorer Eddie Bauer 5.0L MIL Lamp on VIN: 1FMZU84P1Y
P0174: fuel system too lean bank 2. ... in advance for your time. This explorer came in to me with the service engine soon light on which had been on for nearly a year. It is time for mass state inspection so it was time that he finally had to get it fixed. I scaned for codes and found p0171 and...
January 26, 2010
2000 Ford Explorer Eddie Bauer 5.0L MIL Lamp on VIN: 1FMZU84P1Y
P0174: fuel system too lean bank 2. ... in advance for your time. This explorer came in to me with the service engine soon light on which had been on for nearly a year. It is time for mass state inspection so it was time that he finally had to get it fixed. I scaned for codes and found p0171 and...
January 27, 2010
2004 Jaguar X-Type 3.0L MIL Lamp on VIN: SAJEA51C84
P0174: Lean Condition - Bank 2. ... help. this clean car came in with codes P0171 & P0174. off idle fuel trims are normal. at idle in park lt fuel trims are both at 18%, idle in drive 19.5%. car idles beautifully and vacuum is 20.5". MAP reads 8.9" - 9.2" (we are just barely ...
January 28, 2010
2006 Nissan Maxima SE 3.5L MIL Lamp on VIN: 1N4BA41E86
P0174: Fuel Trim Lean (Bank 2). ... years. retrieved code p2a03- o2 sensor range/ performance. found fuse number 15 in underdash fuse panel had been removed. installed new fuse. cleared cel. cel came back on with p0420- cat efficency. inspected cats with boros...
January 28, 2010
2004 Jaguar X-Type 3.0L MIL Lamp on VIN: SAJEA51C84
P0174: Lean Condition - Bank 2. ... help. this clean car came in with codes P0171 & P0174. off idle fuel trims are normal. at idle in park lt fuel trims are both at 18%, idle in drive 19.5%. car idles beautifully and vacuum is 20.5". MAP reads 8.9" - 9.2" (we are just barely ...
January 29, 2010
2006 Nissan Maxima SE 3.5L MIL Lamp on VIN: 1N4BA41E86
P0174: Fuel Trim Lean (Bank 2). ... years. retrieved code p2a03- o2 sensor range/ performance. found fuse number 15 in underdash fuse panel had been removed. installed new fuse. cleared cel. cel came back on with p0420- cat efficency. inspected cats with boros...
January 29, 2010