Exhaust Gas Temperature Sensor

An Exhaust Gas Temperature (EGT) sensor is a component used to measure the temperature of the exhaust gases in a vehicle's exhaust system. It provides crucial information to the engine control unit (ECU) for fuel management and emissions control.

Causes of EGT sensor failure:

• Exposure to extreme temperatures: Excessive heat or thermal shock can damage the sensor.
• Contamination: The sensor may become contaminated with exhaust soot, oil, or other debris.
• Sensor wiring issues: Damaged or faulty wiring can cause sensor failure.
• Sensor element damage: Physical damage to the sensor element can lead to failure.
• Electrical problems: Faulty connections or issues with the electrical circuit can cause sensor malfunction.

Symptoms of a faulty EGT sensor:

• Check Engine Light (CEL) or Malfunction Indicator Lamp (MIL) illuminates.
• Decreased engine performance or power loss.
• Poor fuel economy.
• Black smoke from the exhaust.
• Unusual or excessive exhaust emissions.
• Inaccurate or erratic temperature readings.
• Engine misfires or rough idle.
• Difficulties during vehicle startup or shutdown.

Remember, these symptoms can also be caused by other issues within the exhaust system, so proper diagnosis by a qualified technician is recommended to determine the precise cause of the problem.