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Home/DTC Codes/Lincoln/MKX/2018-2018 3.7L V6/P0508
P0508

Idle Air Control System Circuit Low

2018-2018 Lincoln MKX 3.7L V6

Moderate SeverityPowertrainGeneric (SAE)

The 2018 Lincoln MKX is equipped with a 3.7L V6 engine. Below you'll find detailed p0508 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

Low voltage in IAC circuit.

Symptoms

  • Low idle
  • Stalling

Common Causes

  • Short to ground
  • Faulty IAC motor
  • Wiring issue

Diagnostic Steps

  1. Test IAC voltage
  2. Check for shorts

Repair Notes

Replace IAC or repair wiring.

Related Codes

P0505Idle Air Control SystemP0509Idle Air Control System Circuit High

Other Powertrain Codes

P0508 on Other Vehicles

Lincoln Aviator

2003-2003 4.6L V8 DOHC

Lincoln Aviator

2004-2004 4.6L V8 DOHC

Lincoln Aviator

2005-2005 4.6L V8 DOHC

Lincoln Aviator

2020-2020 3.0L Twin-Turbo V6

Lincoln Aviator

2020-2020 3.0L V6 Twin Turbo

Lincoln Aviator

2020-2020 3.0L V6 Twin Turbo Hybrid

Lincoln Aviator

2021-2021 3.0L Twin-Turbo V6

Lincoln Aviator

2021-2021 3.0L V6 Twin Turbo

Common Questions

What does code P0508 mean on a 2018-2018 Lincoln MKX?

P0508 stands for "Idle Air Control System Circuit Low". Low voltage in IAC circuit.

What are the symptoms of P0508 on a Lincoln MKX?

Common symptoms of P0508 include: Low idle, Stalling.

What causes P0508 on a 2018-2018 Lincoln MKX?

Common causes of P0508 include: Short to ground, Faulty IAC motor, Wiring issue.

Last updated: March 2026

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