Engine-Codes - Generic - P1509

P1509 Code - Idle Air Control Valve System High RPM

- Code Popularity: 43,158 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1509?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Idle Air Control Valve
  • Idle Air Control Valve harness is open or shorted
  • Idle Air Control Valve circuit poor electrical connection
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How to Fix the DTC P1509?

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 connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1509 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the P1509 Code Mean?

The target idle speed is in the Engine Control Module (ECM) memory for various engine conditions (coolant temperature, A/C operation and so on). The ECM keeps the actual idle speed at the target idle speed by switching the Idle Air Control Valve IACV) ON/OFF to control the intake airflow. If the IACV output duty cycle (the length of ON time) is out of a specified range, a malfunction is detected and a DTC is stored.

P1509 Code - Idle Air Control Valve System High RPM

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Code P1509 Information for Specific Makes

  • P1509 Acura Idle Air Control Valve System High RPM
  • P1509 Audi Idle Air Control Circuit Electrical Malfunction
  • P1509 BMW Idle Speed Control Valve Opening Solenoid Control Circuit Electrial
  • P1509 Buick Idle Speed High Idle Air Control System Not Responding
  • P1509 Cadillac Idle Speed High Idle Air Control System Not Responding
  • P1509 Chevrolet Idle Speed High Idle Air Control System Not Responding
  • P1509 Dodge Leak Detection Pump Switch or Mechanical Fault
  • P1509 GMC Idle Speed High Idle Air Control System Not Responding
  • P1509 Honda Idle Air Control Valve System High RPM
  • P1509 Hyundai MPS - High
  • P1509 Isuzu IAC System RPM High
  • P1509 Jaguar Idle Air Control Valve Circuit Malfunction
  • P1509 Mazda Idle Air Control Valve 2 Short / Open Circuit
  • P1509 MINI Idle Speed Control Valve Opening Solenoid Control Circuit Electrial
  • P1509 Volkswagen Idle Air Control Circuit Electrical Malfunction

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