mass air flow sensor code p0171

Cleaning the air flow sensor may help temporarily. A code P0171 may mean that one or more of the following has happened.

Code P0171 System Too Lean Symptoms Causes Common Problems Diagnostic

If other codes are present they must be addressed first.

. Fuel Pressure Testing Gauge. P0171 Fuel TrimBank1 System too Lean 16556 P0172 Fuel TrimBank1 System too Rich 16557 P0173. Reinstall the mass airflow sensor and clear the check engine light using FIXD.

Nissan MAF sensor is located right next to the engine air filter housing typically on the drivers side. Diagnostic Trouble Codes. Mass or Volume Air Flow Circ High Input 16489 P0105 Manifold AbsPressure or BarPressure Voltage supply 16490 P0106.

The most obvious problem is restricted airflow from the air cleaner to the MAF sensor which can be a clogged air filter. If there are no intake leaks the next step is to replace the air filter and clean the air flow meter. P0171 code tech notes If the P0171 is combined with the P0174 code its very likely that the problem is caused by an intake leak.

USE FIXD TO ENSURE NO OTHER ENGINE CODES ARE PRESENT. The MAF Sensor has low voltage output problems which may have several causes. Here is the list of DTCs.

Mass Air Flow Sensor Circuit Malfunction. Bad Fuel Injectors If you have one or more fuel injectors that have gone bad that can certainly cause the airfuel mixture to go bad. The PCM detects that the actual MAF sensor frequency signal is not performing within the normal expected range of the calculated MAF value.

Mass Air Flow Sensor The mass air flow sensor calculates the volume of air entering the engine. What causes the P0102 code. Fuel trim malfunction AF too lean P0172.

Problems with the mass air flow MAF sensor causing the code P0171 are fairly common in many vehicles. If the problem persists. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.

This P0100 diagnostic trouble code DTC means that there is a detected problem with the Mass Air Flow MAF sensor or circuit. The first code is a numerical code assigned by the factory. The source of the problem is the sensor range voltage is lower than normal or required by the ECU to function properly.

Mass Air Flow Sensor The mass air flow sensor calculates the volume of air entering the engine. Use FIXD to scan your vehicle to verify P0171 is the only code present. Watch the following video on how to remove the air filter box to access the MAF sensor.

The proper repair involves replacing the faulty mass air flow sensor. If it has gone bad the air fuel mixture will be off and the P0171 code will show. Bad Fuel Injectors If you have one or more fuel injectors that have gone bad that can certainly cause the airfuel mixture to go bad.

The MAF Mass Air Flow Sensor is dirty or faulty Note. Locate a mass airflow sensor in the engine bay. Remove the mass airflow sensor and clean the sensor using mass air flow cleaner or contact cleaner.

Subaru Trouble Code Info Retrieving Trouble Codes 96 later are OBD2 systems. Unplug the electrical connector from your Nissan mass airflow sensor. Mass Air Flow Sensor Circuit Range Problem.

Sometimes the mass air flow sensor just gets dirty and gives false air flow readings causing the engine to run lean. The second code is referred to as a P-code. This is a HUGE file 48 pages so its probably easiest to use your scroll function to.

Fuel trim malfunction AF too rich PO181. Mass Air Flow Cleaner. If the check engine light comes back on with code P0174 continue the diagnostic process.

GM Motor Company Group. The use of oiled air filters may cause the MAF to become dirty if the filter is over-oiled. If it has gone bad the air fuel mixture will be off and the P0171 code will show.

Getting Rid Of Cel Code P0171

P0171 System Too Lean Bank 1 Maf Sensor Problems