Car encyclopedia

Fuel Tank Pressure Sensor

The fuel tank pressure sensor reads pressure (both positive and negative) inside the fuel tank and transmits the information to the engine control computer.

Symptoms of Wear or Failure

  • Illumination of the Check Engine Light

Related Repair Advice

  • By monitoring the fuel tank pressure under certain conditions, the engine control computer can determine if an evaporative system leak is present, such as a loose or faulty gas cap
  • Evap system diagnosis can be difficult and trouble codes can be triggered by sensors and components other than the fuel tank pressure sensor
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