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Home/DTC Codes/GMC/Envoy/2002-2009 4.2L I6/P0109
P0109

MAP/BARO Pressure Circuit Intermittent

2002-2009 GMC Envoy 4.2L I6

Moderate SeverityPowertrainGeneric (SAE)

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

GMC Acadia

2017-2024 2.5L I4

GMC Acadia

2017-2024 3.6L V6

GMC Canyon

2004-2012 2.8L I4

GMC Canyon

2004-2012 3.5L I5

GMC Canyon

2007-2012 2.9L I4

GMC Canyon

2007-2012 3.7L I5

GMC Canyon

2015-2022 2.8L I4 Duramax Diesel

GMC Canyon

2015-2022 3.6L V6

Common Questions

What does code P0109 mean on a 2002-2009 GMC Envoy?

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

What are the symptoms of P0109 on a GMC Envoy?

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

What causes P0109 on a 2002-2009 GMC Envoy?

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

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