Air flow mass meter symptoms of bad

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.The check engine lamp can be caused by a wide variety of problems with the engine: you need to read the codes from the computer to get a starting clue as to what the problem is (see Project for details on reading the codes).

It's perfectly safe to continue to drive the car while the CEL light is on, as long as it is not flashing.

How to tell you got a bad MAF

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. The first step in diagnosing a faulty MAF sensor is to perform my favorite test—the tap test. Using a screwdriver, lightly tap on the sensor while the engine is running, noting any changes in engine rpm or idle quality with each tap.