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Nitrogen Oxide NOx Sensor

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Company news about What are the symptoms of a bad exhaust temperature sensor?

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What are the symptoms of a bad exhaust temperature sensor?

2026-06-17

A faulty exhaust temperature sensor typically presents the following common symptoms:

  1. ‌Dashboard warning alerts‌: The engine malfunction indicator light will stay on, and some diesel vehicles may also see the glow plug warning light flashing or the particulate filter warning light illuminating. In severe cases, the vehicle will enter limp mode with a "reduced power" prompt.
  2. ‌Deteriorated power performance‌: The engine output weakens, acceleration becomes unresponsive, cold start requires multiple ignition attempts, and there may be unstable idling or intermittent power interruption during driving.
  3. ‌Abnormally increased fuel consumption‌: The ECU cannot accurately adjust the air-fuel ratio, leading to a 10%-15% rise in urban working condition fuel consumption, and the exhaust pipe may emit the smell of unburned gasoline.
  4. ‌Excessive exhaust emissions‌: Harmful substances in the tail gas exceed the standard, which may cause the vehicle to fail the annual inspection. The OBD system will store fault codes such as P0420, and some models will trigger a speed limit protection function.
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Company news about-What are the symptoms of a bad exhaust temperature sensor?

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News

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What are the symptoms of a bad exhaust temperature sensor?

2026-06-17

A faulty exhaust temperature sensor typically presents the following common symptoms:

  1. ‌Dashboard warning alerts‌: The engine malfunction indicator light will stay on, and some diesel vehicles may also see the glow plug warning light flashing or the particulate filter warning light illuminating. In severe cases, the vehicle will enter limp mode with a "reduced power" prompt.
  2. ‌Deteriorated power performance‌: The engine output weakens, acceleration becomes unresponsive, cold start requires multiple ignition attempts, and there may be unstable idling or intermittent power interruption during driving.
  3. ‌Abnormally increased fuel consumption‌: The ECU cannot accurately adjust the air-fuel ratio, leading to a 10%-15% rise in urban working condition fuel consumption, and the exhaust pipe may emit the smell of unburned gasoline.
  4. ‌Excessive exhaust emissions‌: Harmful substances in the tail gas exceed the standard, which may cause the vehicle to fail the annual inspection. The OBD system will store fault codes such as P0420, and some models will trigger a speed limit protection function.
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