OBD II Fault Code

  • OBD II P00A9


  • Bank 2

OBD-II Code Decreased engine performance is defined as a Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic


  • Powertrain


  • Fuel And Air Metering

The Intake Air Temperature Sensor measures the air temperature going into the engine. The engine control module (PCM) uses this information to determine how much fuel to use to keep the engine running properly. When the PCM detects a problem with this sensor or the circuit for the sensor, it will set code P00A9.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Increased fuel consumption

Common Problems That Trigger the P00A9 Code

  • Intake Air Temperature (IAC) sensor failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue
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