What sensors help the ECM determine air flow?
The intake air temperature sensor (IAT) tells the ECM the temperature of the air that is going into the engine. The cooler the air, the better the performance of the engine, which is probably why you might have noticed a difference in the car’s performance on a summer night as compared to the day.
What sensors does an ECU need?
The ECU needs inputs from vehicle sensors like the crankshaft sensor and camshaft sensors to compute the information using a program that has been stored in the ECU on a programmable memory chip.
What happens when a mass airflow sensor is faulty?
The air mass information is necessary for the ECU to correctly balance and deliver the correct amount of fuel to the engine. When a vehicle’s mass airflow sensor is faulty or defective it can cause a variety of problems, and usually results in very poor performance from your engine.
How are sensor data used in the ECU?
While this is going on, the oxygen sensor takes readings from the exhaust gases to determine how much fuel to add with the fuel injectors into the combustion chamber. The ECU uses the camshaft and crankshaft position sensors to determine where the pistons and valves in the engine are at any given time.
How is the ECU dependent on the drivetrain?
The engine and drivetrain are the most dependent on the ECU. Through a numerous array of electronic sensors, chips, and components within the vehicle, the ECU can transmit data feedback to the engine. The nature of this feedback will determine which function the engine will perform next.
How does a MAF sensor work in an ECM?
What is a MAF sensor? A Mass Airflow (MAF) sensor, also known as an “air meter,” measures the air coming into the intake system and transmits this information to the ECM. The ECM utilises the MAF sensor output signal to precisely schedule fuel injection, creating an optimal air-fuel ratio.
Can a bad mass air flow sensor trigger a check engine light?
Bad mass air flow sensor with no check engine light? Sometimes a mass airflow sensor can start to fail and even trigger engine error codes such as P0101 and P0102, without triggering a check engine light. There must be a problem with the mass airflow sensor circuit for the check engine light to illuminate.
While this is going on, the oxygen sensor takes readings from the exhaust gases to determine how much fuel to add with the fuel injectors into the combustion chamber. The ECU uses the camshaft and crankshaft position sensors to determine where the pistons and valves in the engine are at any given time.
What are the symptoms of a bad air flow sensor?
The symptoms of a bad mass air flow sensor include low engine power, poor fuel economy, an engine that won’t start, a check engine light on the dash and a gas smell from the exhaust fumes. A bad mass air flow sensor is often the likely culprit if your car isn’t running as it should.
Where is the mass airflow sensor located on a car?
The mass airflow sensor is mounted towards the top of the engine, where it’s in the path of air that has just passed through the engine’s air filter. An incorrectly installed (or missing) air filter can damage the sensor by allowing harmful particles to make contact with it.