P0171 help

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Old 02-07-2010, 10:22 AM
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P0171 help

whats goin on guys i wanted to know if anyone here works for the acura dealership in jersey? i drew the code from autozone went to the stealership and they want to keep the car overnight to check a whole bunch on nonsense i read the thread regarding this code being related to just upgrading the ecu and presto.these idiots dont seem to understand that and want to work around it if anyone here works in a dealership and can cut the crap ill really appreciate it thx
Old 02-07-2010, 11:06 AM
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From what I understand, the flash/update TSB is only for a 2007-2008 TL-s.
Old 02-07-2010, 01:44 PM
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Originally Posted by Turbonut
From what I understand, the flash/update TSB is only for a 2007-2008 TL-s.

o shyt yea thanks alot lmao guess ima have to go in then
Old 02-08-2010, 05:40 AM
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Originally Posted by eddiebeltoe
whats goin on guys i wanted to know if anyone here works for the acura dealership in jersey? i drew the code from autozone went to the stealership and they want to keep the car overnight to check a whole bunch on nonsense i read the thread regarding this code being related to just upgrading the ecu and presto.these idiots dont seem to understand that and want to work around it if anyone here works in a dealership and can cut the crap ill really appreciate it thx

Did you have AutoZone erase the code? If so, did it come back? I've had this code pop up several times (along with P0174) on my wife's Isuzu Rodeo. Often times when you get either code and take it to the dealer or other repair facility, you will be told you need an O2 sensor. In reality, the O2 sensor may be just fine and something upstream is causeing the O2 sensor to report an abnormal condition. Example: in my wife' Rodeo, it was a loose coil pack on one of the spark plug tubes. Fixed that, erased the code...never came back again.
Old 02-08-2010, 05:52 AM
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Originally Posted by eddiebeltoe
... went to the stealership and they want to keep the car overnight to check a whole bunch on nonsense i read the thread regarding this code being related to just upgrading the ecu and presto.these idiots dont seem to understand that and want to work around it if anyone here works in a dealership and can cut the crap ill really appreciate it thx
Originally Posted by Turbonut
From what I understand, the flash/update TSB is only for a 2007-2008 TL-s.


Maybe that's why the dealership wanted to keep the car overnight and run some actual tests? Sometimes things are cut and dry, sometimes things aren't. Trust me.
Old 02-08-2010, 11:38 PM
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it needs a pcm update and valve adjustment
Old 03-05-2010, 12:15 AM
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Does it have an aftermarket CAI? On some makes/models, people over-oil their air filters (like K&N) and it sprays oil onto the Mass Air Sensor. Car then thinks it's leaning out (and thus throws both codes together). Wash MAS with carb cleaner and let dry. 0171/0174 are common codes in late model Corvettes for this reason. No idea on TLs, but thought I throw it out there FWIW...
Old 03-05-2010, 05:09 AM
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Originally Posted by Pat04TL
Does it have an aftermarket CAI? On some makes/models, people over-oil their air filters (like K&N) and it sprays oil onto the Mass Air Sensor. Car then thinks it's leaning out (and thus throws both codes together). Wash MAS with carb cleaner and let dry. 0171/0174 are common codes in late model Corvettes for this reason. No idea on TLs, but thought I throw it out there FWIW...
we dont have a MAF sensor, we have a MAP(manifold absolute pressure) sensor. basically it reads the pressure inside the intake manifold then calculate the density to determine the mass air flow(MAF) atleast im 90% sure. the MAP sensor doesnt get nearly as dirty as the MAF sensor because the MAP sensor isnt in the way of the air flow like the MAF sensor. so its pretty likely that is not the problem

edit: since its an 04 and u probably have around 80-90,000 miles its probably worth a shot
Old 03-05-2010, 01:08 PM
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Originally Posted by eddiebeltoe
whats goin on guys i wanted to know if anyone here works for the acura dealership in jersey? i drew the code from autozone went to the stealership and they want to keep the car overnight to check a whole bunch on nonsense i read the thread regarding this code being related to just upgrading the ecu and presto.these idiots dont seem to understand that and want to work around it if anyone here works in a dealership and can cut the crap ill really appreciate it thx
If my memory serves me right - this code was popping up on my Audi A4 (it would still run fine, but the code would come up) Quattro and troubleshot it to a dirty MAF. Cleaned it, ran fine for a long time, then popped up again - cleaned it - came back quicker.

Put a new MAF and it ran fine - actually much better (I think it was reading slightly off - resulting in a slightly richer mixture).

Came to the conclusion that once I diagnosed it, cleaned it, should have replaced it.
Old 03-12-2010, 09:40 PM
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Originally Posted by greco9885
we dont have a MAF sensor, we have a MAP(manifold absolute pressure) sensor. basically it reads the pressure inside the intake manifold then calculate the density to determine the mass air flow(MAF) atleast im 90% sure. the MAP sensor doesnt get nearly as dirty as the MAF sensor because the MAP sensor isnt in the way of the air flow like the MAF sensor. so its pretty likely that is not the problem

edit: since its an 04 and u probably have around 80-90,000 miles its probably worth a shot
Yeah, definitely a stretch. Another possibility would be putting on a CAI and not sealing it up properly (e.g. vacuum leak) that adds extra air across the sensor.
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