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会社ニュース What are the symptoms of a faulty exhaust gas temperature sensor?

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What are the symptoms of a faulty exhaust gas temperature sensor?

2025-11-07

A faulty exhaust gas temperature (EGT) sensor can cause several symptoms related to engine performance, fuel efficiency, and emissions control. Here are the key symptoms:

  1. Reduced Engine Power

    • The engine may feel sluggish, especially during acceleration, climbing, or overtaking.
    • Cold starts may become difficult, requiring multiple attempts in low temperatures.‌1
    •  
    • Increased Fuel Consumption

      • Misfueling due to incorrect air-fuel mixture control can lead to a noticeable rise in fuel consumption (up to 10–15% in city driving).
      • Unburned gasoline odor from the exhaust may indicate incomplete combustion.‌1
      •  
      • Emissions and Diagnostic Issues

        • Excessive tail gas emissions, potentially triggering OBD fault codes like P0420 (catalyst efficiency).
        • The engine warning light (MIL) may illuminate, and some vehicles may enter a "reduced power" protection mode.‌1
        •  
        • Sensor-Specific Fault Codes

          • Diagnostic tools may read codes such as P2033, indicating an abnormally high temperature signal from the sensor (e.g., Bank 1 Sensor 2).‌2
          • Diagnostic Tip‌: Use an OBD scanner to check real-time sensor data and compare it with expected temperature curves. An infrared thermometer can help verify if the sensor is reporting inaccurately.‌1

            If these symptoms appear, prompt diagnosis and repair are recommended to prevent potential engine damage.

          •  
        •  
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会社ニュース-What are the symptoms of a faulty exhaust gas temperature sensor?

What are the symptoms of a faulty exhaust gas temperature sensor?

2025-11-07

A faulty exhaust gas temperature (EGT) sensor can cause several symptoms related to engine performance, fuel efficiency, and emissions control. Here are the key symptoms:

  1. Reduced Engine Power

    • The engine may feel sluggish, especially during acceleration, climbing, or overtaking.
    • Cold starts may become difficult, requiring multiple attempts in low temperatures.‌1
    •  
    • Increased Fuel Consumption

      • Misfueling due to incorrect air-fuel mixture control can lead to a noticeable rise in fuel consumption (up to 10–15% in city driving).
      • Unburned gasoline odor from the exhaust may indicate incomplete combustion.‌1
      •  
      • Emissions and Diagnostic Issues

        • Excessive tail gas emissions, potentially triggering OBD fault codes like P0420 (catalyst efficiency).
        • The engine warning light (MIL) may illuminate, and some vehicles may enter a "reduced power" protection mode.‌1
        •  
        • Sensor-Specific Fault Codes

          • Diagnostic tools may read codes such as P2033, indicating an abnormally high temperature signal from the sensor (e.g., Bank 1 Sensor 2).‌2
          • Diagnostic Tip‌: Use an OBD scanner to check real-time sensor data and compare it with expected temperature curves. An infrared thermometer can help verify if the sensor is reporting inaccurately.‌1

            If these symptoms appear, prompt diagnosis and repair are recommended to prevent potential engine damage.

          •  
        •