Car Repair World

Vehicle Sensor Reference Guide Types Of Sensor In Your Vehicle Oxygen Sensors (O2) Throttle Position Sensor (TPS) Mass Air Flow Sensor (MAF) Engine Coolant Temperature Sensor (ECT) Intake Air Temperature Sensor (IAT) Exhaust Gas Recirculation (EGR) Most Common Engine Sensors understand the purpose and failure systems of most common sensors. Use your scantool and tech tip to diagram. Oxygen Sensors (O2) Purpose: Measure the amount of oxygen left in the exhaust stream to provide feedback to the computer about whether the air/fuel mixture is rich or lean. Symptoms: Poor fuel economy Rich fuel mixture Check Engine Light Failed emissions test Tech Tip: Test for O2 sensors in front of catalytic converter (S1B1 and S1B2 on your scantool). With the engine warm, graph the O2 sensor output. Rev the engine to approximately 2000 RPM. A good sensor will oscillate from below 0.2 volts to above 0.8 volts, looking approximately like a sine wave. A bad sensor will b...

Mass Air Flow Sensor Service Helpful Information The automotive industry uses carburetor cleaner though carburetors are only featured on older cars. This aerosol cleaner is light, and cleans deposits most cleaners cannot. Sometimes shorted to "carb" cleaner this helpful chemical is a must for any repair garage. Step by step guide on how to service an automotive mass air flow sensor, this article pertains to most MAF equipped cars. Difficulty Scale: 2 of 10 Begin with the car on level ground, in park with the emergency brake set. Step 1  - Locate the mass air flow sensor located in the air intake portion of the air filter or intake tube. Mass Air Flow Sensor Step 2  - Once the sensor has been located, release the wiring connector to the sensor. Removing Mass Air Flow Sensor Electrical Connector Step 3  - After the electrical connector has been removed, loosen and remove the sensor mounting screws. Removing Sensor Mounting Screws Step 4  - Next,...

Mass Air Flow Sensor Replacement MAF Helpful Information After starting the engine post sensor replacement, the sensor instantly calibrates itself so there is no learn time required. This sensor is subject to debris and contamination which can be avoided by  cleaning the sensor  (Note: Some sensors are located inside the air filter housing, not all cars are equipped with a mass air flow sensor, consult a repair manual for exact component location.) Best Practices Clean the air intake tube and connection points to ensure proper installation. Step by step guide on how to replace an automotive mass air flow sensor, this information pertains to most vehicles though applications may vary. Difficulty Scale: 2 of 10 Begin with the vehicle on level ground, parking brake on, engine off. Step 1  - When replacing a mass air flow sensor, first locate the sensor which is positioned in the air intake tube between the air filter housing and throttle body. Mass Air...