Question about 1999 Oldsmobile Alero

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P0171 code on 1999 olds cutlass 3.1liter

I just had intake gasket replaced. Now I have a P071 code.

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Code P0071 is ambient air temperature sensor range/performance problem code po171 is that bank 1 is running lean, hope this helps get back to me if you need more help. Please rate my fix? as i strive to be the best Thanks Ray

Posted on Dec 12, 2009

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Check to make sure all vacunm hoses and lines are correctly in place. A Lean code generally means that air is getting in past Mass Air Flow Sensor.Upstream O2 sensors read exhaust b4 Cat converter.

Posted on Dec 12, 2009

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3 Answers

Code p0171 and p0174


P0171 possible cheap fix

Feb 21, 2015 | 2002 GMC Sierra 1500

1 Answer

OBD code p0171. sometimes my 1999 ford explorer starts like it is missing until it warrms up


you may have a faulty intake gasket, for some reason you have air leaking into your engine that is bypassing your air measuring device...you may have a vacuum hose that is cracked, intake manifold gasket leak that seals itself with heat, or possibly a faulty mass airflow sensor

Mar 01, 2011 | 1999 Ford Explorer

2 Answers

Windstar 2000 3.8. Runs fine. Checked for codes and got p0171 and p0174. Cleaned the MAF sensor. Went to erase codes and found the there is a third one in there now. p0113. What is wrong?


The upper intake manifold gaskets and isolators (the bolts that hold the manifold down) leak and cause the p0171 and p0174. The reason they leak is due to a missing baffle in the front valve cover which allows some oil into the upper intake which swells the gaskets and wears them. The manifold gaskets and valve cover should be replaced. But before having this done check to see if the black plastic hose on the back of the rubber intake hose(between the throttle body and maf) has dislodged. This happens alot when a new air filter is installed and will cause the same codes.

Mar 30, 2010 | 2000 Ford Explorer

2 Answers

How do i fix emission codes p1131 p1151 p0171


TSB
05-22-6
ISSUE:
Some 2001-2003 F-150, 2004 F-150 Heritage and 2001-2003 E-150/250 vehicles equipped with a 4.2L engine may exhibit the malfunction indicator lamp (MIL) on with diagnostic trouble codes (DTCs) P1131 and/or P1151 (system too lean bank 1 or 2). This condition may be due to leaking isolator bolts/port gaskets in the upper-to-lower intake manifold mounting area. This condition is sometimes intermittent and may not be apparent on a warmed-up engine.


SERVICE PROCEDURE

Perform a self test. If DTC P1131 and/or P1151 are the only codes stored in the powertrain control module (PCM) proceed to Step 2. If any additional DTCs are present, follow normal diagnostic procedures found in the PC/ED Manual.

Remove the upper intake and replace only the port gaskets (9H486) and isolator bolt assemblies (9S479). The new isolator bolt assemblies use a rubber material that is green in color, do not install the old isolator bolt assemblies with the black rubber material. Do not replace any other intake parts or gaskets.
While the upper intake manifold is removed, check the exhaust gas recirculation (EGR) orifices that are pressed into each primary port of the lower intake manifold. If any of the orifices are plugged with soot, clean and unplug them with a pick and solvent.

PART NUMBER PART NAME
1L3Z-9H486-AA Port Gasket
3F2Z-9S479-AA Isolator Bolt

Jan 13, 2010 | 2003 Ford F150 Regular Cab

1 Answer

2000 Nissan Sentra 1.8 with P071 trouble code, too lean bank 1


do you mean P0171??
If so, then it means your MAF sensor may be dirty and needs to either be cleaned or replaced.
It could also mean there's a vacuum leak downstream of the MAF sensor

Oct 12, 2009 | Nissan Sentra Cars & Trucks

2 Answers

My 1999 alero is overheating and engine coolant is leaking


hi, i dont know about the dipstick, but your overheating problem is most likely to be the thermostat...sounds like its stuck in the closed position,not allowing colder water to circulate, hence the overheating.......needs changing

Jul 27, 2009 | 1999 Oldsmobile Alero

2 Answers

1999 ford taurus emission reading p0171 and p0174


just tune up ur car periodicly, clean filter. clean ur sparkplug.

Jan 08, 2009 | 2001 Ford Taurus

5 Answers

Code #P0171 & code #P0174


Look, man here is the deal:
code p0174 - refer to the front cylinder bank
code p0171 - refer to the rear cylinder bank

Jun 22, 2008 | 2002 Ford Explorer Sport

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