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Code result

P00A9

Intake Air Temperature Sensor 2 Circuit Intermittent/Erratic Bank 2

Moderate severity

What it means

Intermittent dropouts or noise on IAT sensor 2 bank 2 signal. The intake air temperature sensor feeds the ECM's density calculation — a drifted reading miscalculates fuel mass and pushes mixture lean (cold reading) or rich (hot reading).

Is it safe to drive?

Use caution

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

  • Connector loose or corroded

    high

    One of the most commonly reported causes for this code — check this first.

  • Connector with intermittent contact under vibration

    low

    Less common, but worth ruling out after the more likely causes.

  • Harness routed against vibrating component

    low

    Less common, but worth ruling out after the more likely causes.

Related help

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