Symptoms of bad air flow mass sensor

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.

Testing to see if the mass air flow (MAF) sensor on your Toyota L equipped Corolla is bad (or not) isn't hard.

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.

LTFT running in the 20% range, and definite hesitation when hard accelerate from 3500-45RPM range. New MAF in and nO CEL codes. MAF/VANE AIRFLOW related trouble codes stored in the engine control computer. Inspect the wiring harness and connectors for damage. 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.