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Home/DTC Codes/Lincoln/Mark LT/2006-2008 5.4L V8/P0507
P0507

Idle Air Control System RPM Higher Than Expected

2006-2008 Lincoln Mark LT 5.4L V8 🇨🇦

Moderate SeverityPowertrain

Description

The idle speed is consistently above the target RPM.

Symptoms

  • High idle speed
  • Engine racing at idle

Common Causes

  • Vacuum leak (most common)
  • IAC valve stuck open
  • Throttle plate not closing fully
  • Intake gasket leak

Diagnostic Steps

  1. Check for vacuum leaks
  2. Inspect throttle plate
  3. Test IAC valve
  4. Check intake gaskets

Repair Notes

Find and fix vacuum leak. Clean throttle body. Replace IAC if stuck open.

Related Codes

P0505Idle Air Control SystemP0506Idle Air Control System RPM Lower Than Expected

Other Powertrain Codes

P0507 on Other Vehicles

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2003-2005 4.6L V8

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2003-2005 4.6L V8 DOHC

Lincoln Aviator

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2020-2024 3.0L V6 Twin Turbo

Lincoln Aviator Grand Touring

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Lincoln Aviator Grand Touring

2020-2024 3.0L V6 Twin Turbo Hybrid

Lincoln Blackwood

2002-2002 5.4L V8

Common Questions

What does code P0507 mean on a 2006-2008 Lincoln Mark LT?

P0507 stands for "Idle Air Control System RPM Higher Than Expected". The idle speed is consistently above the target RPM.

What are the symptoms of P0507 on a Lincoln Mark LT?

Common symptoms of P0507 include: High idle speed, Engine racing at idle.

What causes P0507 on a 2006-2008 Lincoln Mark LT?

Common causes of P0507 include: Vacuum leak (most common), IAC valve stuck open, Throttle plate not closing fully, Intake gasket leak.

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