mass air flow sensor code p0171

When the mass air flow sensor is faulty it will have low grams per second readings. Well list them in the most to least likely to have happened.

Code P0171 System Too Lean Symptoms Causes Common Problems Diagnostic In 2021 Sensor Oxygen Car Maintenance

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.

. Faulty injectors Faulty oxygen sensors A faulty mass air flow sensor. One of the most common causes of Ford P0171 and P0174 lean codes is a dirty mass airflow MAF sensor. Products Mentioned in this Guide.

The MAF Mass Air Flow Sensor is dirty or faulty Note. P010F Mass or Volume Air Flow Sensor AB Correlation. The use of oiled air filters may cause the MAF to become dirty if the filter is over-oiled.

A faulty fuel pressure regulator. If there are no intake leaks the next step is to replace the air filter and clean the Mass Air Flow MAF Sensor. P0101 Mass or Volume Air Flow Circuit RangePerformance Problem.

When I cleaned my MAF sensor I triggered a P2197 code. Mechanics measure the amount of air flow mass air flow sensor readings at. In my situation it did.

A worn-out oxygen sensor can also trigger code P0174. If the problem persists the MAF or Front Heated Oxygen O2 Sensor will need to be replaced. MAF sensor Aftermarket intake or air filter Bad exhaust system Vacuum leak Low fuel pressure.

A DIRTY MAF SENSOR. A dirty MAF sensor can set a lean code. What are the symptoms of the P0171 code.

This is also a great opportunity to examine your air filter to see if it needs replacement. In other words the engine computer through the O2 sensor and MAF sensor mass air flow adjust your fuel mixture just like a carburetor used to in the olden days. Post Catalyst Fuel Trim.

Diagnostic Trouble Code DTCs --Trouble codes are how OBDII identifies and communicates to technicians where and. A weak fuel pump. Chevy Cruze P1101 Causes.

System too Lean at Idle Bank 1 P2098 Code. Fault codes such as P0171 System Too Lean Bank 1 P0174 System Too Lean Bank 2 and P0101. Dirty obstructed or faulty mass airflow sensor.

Symptoms of the P0171 code may include. The grams per second at idle should be about 18 22 and at 2500 RPM and no load the readings should be about 72. If the P0171 is set in along with the P0174 code it is highly likely that the problem is caused by an intake leak.

Fuel Gas Mass Sens Circ Hi Freq P1211 Mass Air Flow Circ Interm Hi P1212 Mass Air Flow Circ Interm Lo P1214 Inject Pump Timing Offset P1215 Gnd Fault Detection Indicated P1216 Fuel Solenoid Response Time Too Short P1217 Fuel Solenoid Response Time Too Long P1218 Inject Pump Calibration Circ P1219 Throttle Pos Sens Ref Volts. 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. Exhaust Gas Recirculation Flow Excessive Detected.

The next step is to replace the air filter and clean the Mass Air Flow MAF Sensor. P0171 System too Lean Bank 1 P0172 System too Rich Bank 1. Testing the mass air flow sensor.

Causes of the P0171 code may include. Mass Air Flow Sensor Oxygen Sensor Fuel Filter Fuel Pump Fuel Injector Fuel Pressure. The MAF sensor is located in the air inlet tube just ahead of the throttle body.

We use cookies to keep our products working properly improve user experience analyze site traffic through our analytics partners and serve targeted communications. A code P0171 may mean that one or more of the following has happened. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.

The P0171 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. Cylinder Deactivation System Bank 1. If the problem persists the.

A clogged fuel filter. The mass air flow sensor sits right behind the air filter and is easy to reach once the filter is removed. System Too Lean Bank 1 P2187 Code.

To test the mass air flow sensor using a scanner reading live data. If the results of this test are out of range than the P1101 trouble code is thrown. P0110 Intake Air Temperature Circuit Malfunction Bank 1.

There are a number of issues that can cause the mass air flow sensor to fail the diagnostic. P0171 according to the manual is a Fuel System Lean diagnostic trouble code. P0402 is an OBD-II generic code that the engine control module ECM has detected indicating the engine exhaust gas recirculation EGR valve is flowing too much recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold.

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. Write down these codes research them to find out what each code means. This guide will be discussing the Nissan Mass Air Flow MAF sensor.

It is important to complete the entire diagnostic process when diagnosing the Nissan P0171 code. P0101 Mass or Volume Air Flow A Circuit RangePerformance Problem. Whenever you start the vehicle the mass airflow sensor does a self diagnostic.

If the P0171 is set in along with the P0174 code it is highly likely that the problem is caused by an intake leak. P0171 System too Lean Bank 1 P0172 System too Rich Bank 1 P0173 Fuel Trim Malfunction Bank 2. Codes P0171 andor P0174.

A faulty powertrain control module. What the P0402 code means. Cleaning or replacing the sensor should make the code go away.

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