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Home/DTC Codes/Lincoln/Mark LT/2006-2008 5.4L V8/P0506
P0506

Idle Air Control System RPM Lower Than Expected

2006-2008 Lincoln Mark LT 5.4L V8

Moderate SeverityPowertrainGeneric (SAE)

Description

The idle speed is consistently below the target RPM.

Symptoms

  • Low idle speed
  • Stalling
  • Rough idle

Common Causes

  • Carbon buildup in throttle body
  • Vacuum leak
  • Faulty IAC valve
  • Low fuel pressure
  • EGR valve stuck open

Diagnostic Steps

  1. Clean throttle body
  2. Check for vacuum leaks
  3. Test IAC valve
  4. Test fuel pressure
  5. Check EGR valve

Repair Notes

Clean throttle body and IAC. Check for vacuum leaks.

Related Codes

P0505Idle Air Control SystemP0507Idle Air Control System RPM Higher Than Expected

Other Powertrain Codes

P0506 on Other Vehicles

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2003-2005 4.6L V8

Lincoln Aviator

2003-2005 4.6L V8 DOHC

Lincoln Aviator

2020-2024 3.0L Twin-Turbo V6

Lincoln Aviator

2020-2024 3.0L V6 Twin Turbo

Lincoln Aviator Grand Touring

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Lincoln Aviator Grand Touring

2020-2024 3.0L Twin-Turbo V6 Hybrid

Lincoln Aviator Grand Touring

2020-2024 3.0L V6 Twin Turbo Hybrid

Lincoln Blackwood

2002-2002 5.4L V8

Common Questions

What does code P0506 mean on a 2006-2008 Lincoln Mark LT?

P0506 stands for "Idle Air Control System RPM Lower Than Expected". The idle speed is consistently below the target RPM.

What are the symptoms of P0506 on a Lincoln Mark LT?

Common symptoms of P0506 include: Low idle speed, Stalling, Rough idle.

What causes P0506 on a 2006-2008 Lincoln Mark LT?

Common causes of P0506 include: Carbon buildup in throttle body, Vacuum leak, Faulty IAC valve, Low fuel pressure, EGR valve stuck open.

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