P2579 moderate

Turbocharger Intake Air Temperature Sensor Circuit Range/Performance

The P2579 code means the vehicle's onboard diagnostic system has detected: Turbocharger Intake Air Temperature Sensor Circuit Range/Performance. This is a moderate severity code.

My Garage →
Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$150 - $500 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • Inaccurate intake air temperature readings
  • Engine performance may vary with ambient temperature
  • Turbo boost may be limited in hot weather
  • Reduced fuel economy

Probable Causes (Ranked by Likelihood)

  • Intake air temperature sensor out of calibration Very High
  • Clogged or damaged intercooler High
  • Sensor placed incorrectly during previous repair Moderate
  • ECM/PCM software issue Low

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2579 is stored

  2. Compare intake air temp sensor reading to ambient temperature at cold start

  3. Inspect intercooler for debris blockage or damage

  4. Verify sensor is correctly installed in the intake tract

Frequently Asked Questions

What does P2579 mean?

P2579 means the turbocharger intake air temperature sensor readings are outside the expected performance range, often indicating a sensor calibration issue or intercooler problem.

Can I drive with a P2579 code?

Yes, for short distances. The PCM may limit boost as a precaution, reducing power. Have it checked before driving in extreme temperatures.

How much does it cost to fix P2579?

Repairs range from $150 for sensor replacement to $500 if intercooler cleaning or replacement is needed.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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