P1509 GMC - Idle Speed High Idle Air Control System Not Responding

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

P1509 GMC Possible Causes

  • Faulty Idle Air Control (IAC)
  • Idle Air Control Valve harness is open or shorted
  • Idle Air Control Valve circuit poor electrical connection

First diagnose P1509 GMC code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P1509 GMC code

    Labor: 1.0

    The cost of diagnosing the P1509 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

P1509 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine rough idle

P1509 GMC Meaning

With the engine runtime 2 minutes, closed throttle, Engine Coolant Temperature (ECT) input over 122°F, Intake Air Temperature (IAT) over 62°F, VSS under 3 mph, the Powertrain Control Module (PCM) detects that the Actual idle speed was 175 rpm higher than desired idle speed.
OBDII Code P1509 GMC - Idle Speed High Idle Air Control System Not Responding - Engine-Codes.com

P1509 GMC More Information

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