mass air flow sensor code p0171

The air intake boot transports engine air from the MAF sensor up to the throttle accelerator. A code P0171 may mean that one or more of the following has happened.

How To Repair Lean Exhaust Codes

The plugs and fuel filter have fewer than 3000 miles on them.

. I remedied all of the problems and my check engine light went away. Trouble codes P0171 System Too Lean Bank 1 and P0174 System Too Lean Bank 2 are also often caused by a bad or contaminated mass air flow sensor. If it needs to correct the air -fuel mixture more than that the P0171 code will be stored.

Cheap Car Insurance. Code P0171 indicates Bank 1 of the engine has a lean fuel mixture. FIXD I installed a cold air intake on my 2009 GMC Sierra 1500 SLE and had the P0101 code come up for the mass air flow sensor malfunction.

Many people will replace the air-fuel sensor or oxygen sensor as soon as they get a bad reading but the root cause can also be a dirty or faulty mass airflow sensor or vacuum leak thus causing the O2 or MAF sensor to read differently to. The mass air flow sensor calculates the volume of air entering the engine. Cleaning the MAF sensor can usually solve this problem.

If it has gone bad the air fuel mixture will. Several issues can cause the mass airflow sensor to fail the diagnostic. INSPECT MASS AIR FLOW MAF SENSOR.

Mechanics measure the amount of air flow mass air flow sensor readings at. How the mass air flow sensor is tested In modern cars the only way to test the mass air flow sensor is with a scan tool. These codes mean the system is run.

Heres the long story. Remove the mass airflow sensor and clean the sensor using mass air flow cleaner or contact cleaner. Oxygen Sensor The P0171 codes is thrown when the oxygen sensors do not register enough oxygen in the exhaust.

Save Up To 80 Off Retail Prices Buy Discount Auto Parts Parts Here. If either code arrives or both at the same time as say a Mass Airflow Sensor code its a logical step to assume the MAF sensor may be causing the lean condition. The use of oiled air filters may cause the MAF to become dirty if the filter is over-oiled.

Itll be located between the air filter and the throttle body. Ad Search from over 10 Million Auto Parts. Since I have been testing MAF sensors I thought I should bring up this infor.

MAF Out of Self Test Range P1101 is one of the most common Chevy Cruze trouble codes. Parts and Tools Listed Below Cleaning the mass air flow sensor may fix the typical cause of trouble codes P0171 or P0174. It is important to complete the entire diagnostic process when diagnosing the Chevrolet P0171 code.

I started getting the dreaded codes P0171 P0174 Lean mixture banks 1 2 on my 05 E46 330ic with 93k miles. There could be a vacuum leak. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.

You all know the drill to do this you need to remove the intake Manifold unplug just about every sensor vacuum hose on the M54. The P0171 code means that the Oxygen O2 sensor on bank 1 recognized a too lean mixture to correct it. If it fails it will show false reading to the mass air flow sensor tool code.

Whenever you start the vehicle the mass airflow sensor does a self-diagnostic. If it has gone bad the air fuel mixture will be off and the P0174 andor P0171 codes will show. The Oxygen O2 sensors have the ability to correct a fuel mixture of -15.

When the oxygen sensor is bad it can cause a false reading and trigger the code. Many people will replace the air-fuel sensor or oxygen sensor as soon as they get a bad reading but the root cause can also be a dirty or faulty mass airflow sensor or vacuum leak thus causing the O2 or MAF sensor to read differently. The MAF Mass Air Flow Sensor is dirty or faulty.

It is important to complete the entire diagnostic process when diagnosing the Nissan P0171 code. Mass Air Flow Sensor The mass air flow sensor calculates the volume of air entering the engine. I cleaned the Mass Air Sensor but the code returned.

My starter was going bad so I replaced it with a new Bosch unit. If the results of this test are out of range then the P1101 trouble code is thrown. If either P0171 or P0174 is appearing by itself or both codes are stored you have a problem that.

Last night she gave me a code P0171. How to clean your MAF sensor. A common cause for lean condition codes is simply a dirty Mass Air Flow Sensor.

What Drivers Need To Know. They sell a spray cleaner at parts stores its in a spray can with a tube How effitive it is im not sure i mean i have never seen it fix one that wasnt working but could give it a try How ever Po171 is not the code for the mass air flow sensor its fuel trim lean bank 1 O2 sensor is reading MAF would be PO101-PO103. Nissan P0171 Meaning Causes Symptoms Fixes.

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