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Home/DTC Codes/Lincoln/MKX/2018-2018 3.7L V6/P0109
P0109

MAP/BARO Pressure Circuit Intermittent

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 p0109 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

The MAP sensor signal is showing intermittent readings.

Symptoms

  • Check Engine Light (intermittent)
  • Erratic idle
  • Stumble on acceleration

Common Causes

  • Loose connector
  • Damaged wiring
  • Intermittent vacuum leak

Diagnostic Steps

  1. Wiggle test on connector
  2. Monitor MAP signal
  3. Check vacuum hose

Repair Notes

Repair connector or wiring.

Related Codes

P0105Manifold Absolute Pressure/BARO Circuit

Other Powertrain Codes

P0109 on Other Vehicles

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2003-2003 4.6L V8 DOHC

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2004-2004 4.6L V8 DOHC

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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 P0109 mean on a 2018-2018 Lincoln MKX?

P0109 stands for "MAP/BARO Pressure Circuit Intermittent". The MAP sensor signal is showing intermittent readings.

What are the symptoms of P0109 on a Lincoln MKX?

Common symptoms of P0109 include: Check Engine Light (intermittent), Erratic idle, Stumble on acceleration.

What causes P0109 on a 2018-2018 Lincoln MKX?

Common causes of P0109 include: Loose connector, Damaged wiring, Intermittent vacuum leak.

Last updated: March 2026

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