Engine-Codes - Generic - P1506

P1506 Code - Idle Air Control Overspeed Error

- Code Popularity: 21,860 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1506?

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 (IAC) valve
  • IAC valve harness is open or shorted
  • IAC valve circuit poor electrical connection
  • Intake leaks
  • Stuck PCV Valve
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How to Fix the DTC P1506?

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 P1506 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 P1506 Code Mean?

The Idle Air Control Valve (IACV) valve assembly controls the engine idle speed and provides a dashpot function. The IAC valve assembly meters intake air around the throttle plate through a bypass within the IAC valve assembly and throttle body. The Powertrain Control Module (PCM) determines the desired idle speed or bypass air and signals the IAC valve assembly through a specified duty cycle. The IAC valve responds by positioning the IAC valve to control the amount of bypassed air. The PCM monitors engine RPM and increases or decreases the IAC duty cycle in order to achieve the desired RPM.

P1506 Code - Idle Air Control Overspeed Error

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Code P1506 Information for Specific Makes

  • P1506 Audi Closed Throttle Position Switch Does Not Open./Short To Ground
  • P1506 BMW Idle Speed Control Valve Open Solenoid Control Circuit Signal High
  • P1506 Ford Idle Air Control Overspeed Error  
  • P1506 Hyundai Idle Speed Control Actuator Signal High
  • P1506 Jaguar Idle Air Control Overspeed Error
  • P1506 KIA Idle Air Control Valve Opening Coil Voltage High
  • P1506 Lincoln Idle Air Control Overspeed Error
  • P1506 Mazda Idle Air Control Overspeed Error
  • P1506 Mercury Idle Air Control Overspeed Error
  • P1506 MINI Idle Speed Control Valve Open Solenoid Control Circuit Signal High
  • P1506 Mitsubishi Idle Control System RPM Lower Than Expected At Low Temperature
  • P1506 Volkswagen Closed Throttle Position Switch Does Not Open./Short To Ground

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