Question about 1997 Oldsmobile Silhouette

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Diagnostic trouble code P0171 - 1997 Oldsmobile Silhouette

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  • Oldsmobile Master
  • 2,620 Answers

Take the mass air flow sensor off and clean with a non-chlronated brake cleaner.Its location is in between the air filter box and the throttle body inline with the air tube.

Posted on May 25, 2011

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Posted on Jan 02, 2017

ewashmidas
  • 362 Answers

SOURCE: DIAGNOSTIC CODES

Here are the possible causes for the PO171 and PO174 codes:


  • Base engine mechanical problem affecting one or more cylinders
  • Check for air leaks after the MAF sensor
  • Check for air leaks in the Air Induction system (e.g., in the intake manifold)
  • Check for air leaks in the EGR system and in its related hoses and/or valve
  • Check for air leaks in the PCV system and in its related hoses and/or valve
  • Fuel control sensor is out of calibration (e.g., ECT, IAT or MAP)
  • Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
  • Fuel injector (one or more) dirty or pressure regulator has failed
  • HO2S has failed (it may be contaminated with fuel, silicone or water)
  • Vehicle driven low on fuel or until it ran completely out of fuel

Please let me know if this information is helpful. Positive feedback is appreciated. Thank You!

Posted on Mar 20, 2009

  • 191 Answers

SOURCE: Did not pass my emissions

These codes are based on Oxygen Sensor (O2) readings.
Most likely the cause is a vacuum leak. A vacuum leak can be caused from a vacuum hose, intake gasket or maybe even a leak in the air intake hose from the MAF (Mass Air Flow Sensor).
A dirty MAF can also cause the problem, clean with brake kleen, dry completely then reinstall. Check the fuel pressure and replace the fuel filter. Your costs will vary depending on parts needed and who will do the repairs.

Posted on May 16, 2009

  • 373 Answers

SOURCE: 1998 camry, 4cyl. P0171, P1130 toruble codes.

Hi.. On your question the definition of the codes are:
P0171, System to lean ( Fuel trim)
P1130, Air / Fuel sensor circuit range ? performance malfuntion This code is exclusive california Emissions). Oxigen sensor Performance malfuntion.
The first step you need to do is Check the Oxigen ( O2 sensor)
Connections The front and the rear one.
Check the condition of the Air filter Replace if need.
Check Spark plug Replace if need.
Check Fuel condition, Replace fuel filter if need.
And Clear the Codes if averything is good.
If the code P1130 return Replace the Air fuel ratio sensor..

Ok.. I hope this help on your question. If need more info letme know.

Thankyou for use fixya...

Posted on Jul 26, 2009

saailer
  • 1868 Answers

SOURCE: Manufacturer Specific Code P1171

Change upstreamO2 sensor on bank #1



FixYaWIZ...saailer

Posted on Dec 10, 2009

  • 541 Answers

SOURCE: 99 CHEVY trouble shoot code P0171

LEAN TROUBLE CODES (P0171 or P0174) A code P0171 or P0174 indicate the engine is running lean. This means there is too much air and/or not enough fuel. You can confirm the engine is running lean by looking at Short Term Fuel Trim (STFT) and Long Term Fuel Trim (LTFT). Normally, STFT and LTFT should be plus or minus 8 from zero. If STFT and/or LTFT are more than about +10 or higher, it indicates the engine is running LEAN. Negative numbers (-10 or more) indicates the engine is running RICH. A lean fuel condition can be caused by:

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)

______________________________-- Causes A code P0171 may mean that one or more of the following has happened:

  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor.
Possible Solutions Possible solutions include:
  • In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
  • Inspect all vacuum and PCV hoses, replace if necessary
  • Check for a dirty fuel filter and proper fuel pressure

Posted on Jan 02, 2010

Testimonial: "great info. Thanks a million."

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1 Answer

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P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

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Check your Manifold Absolute Pressure Sensor, and it might be a good time to install a new Upstream O2 Sensor.

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p0136 and p0141 are o2 sensors and p0401 is a egr flow and the p0171 means its running lean on low bank 1

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2 Answers

1999 saab 9-3 trouble codes P1171 and P0171 when I start out running rough until I get going a little faster


Hello, i have the same car 1999 saab 93 and i am having the same problems. P1171, P0171 , P0300, I had it at the saab dealer and NOTHING. When i come to a stop she starts to shut down. I just paid $500 for DI cassete and thats not fixing the problem. YOU ever found out what yours was? And what fixed it??????

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1 Answer

What do these trouble codes mean p0171 and p0174


po171 is system too lean,bank 1,po174,is system too lean,bank 2,It sounds like a fuel pressure problem.

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