Symptoms mass air flow sensor is bad

There are a number of things on a car that are built to regulate the amount of air and fuel that get mixed. The mass airflow sensor is one of the most important of these sensors due to the job that it performs. Mass airflow sensor problems can cause a variety of symptoms from the annoying to the must repair. We'll discuss these in-depth on this page.

The faulty mass airflow sensor and how to fix the problem written by: nandy A vehicles MAF or mass airflow sensor, is the element that measures the density and flow of the air passing in to the combustion section.It assists the vehicles computer activate the air ratio to fuel.A bad mass air flow sensor in a vehicle makes starting difficult and affects the performance of the engine because he engine-control unit uses data from the MAF sensor to balance the fuel ratio the injectors deliver to the engine. A bad sensor returns a significantly different temperature than that of the engine coolant when read using a scan tool set to temperature.

How to tell you got a bad MAF

MAF sensor may be hard to start or stall after starting. It may hesitate under loa surge, idle rough or run excessively rich or lean.

MAF is a hesitation after the accelerator pedal is depressed. Some other common symptoms include the following:Difficulty startingStalling shortly after startingHesitation under loadJerking during accelerationErratic idle or operation Fuel-trim-related code(s)Excessively rich or lean idling, often causing black smoke from the tailpipeCommon Causes of MAF FailuresThe majority of MAF failures are due to dirt, paper, or oil contamination. A bad sensor will be flat-lined and show no response to snapping the throttle. Test for Osensors behind the catalytic converter: Graph the rear and the front Osensor output. MAF/VANE AIRFLOW related trouble codes stored in the engine control computer.

Inspect the wiring harness and connectors for damage.

How to Detect and Clean a Faulty Mass Airflow Sensor - CarsDirect

The Mass AirFlow (MAF) sensor is usually located between the air filter housing and the throttle. The MAF sensor uses a heated wire or filament to measure airflow into the engine.