Engine-Codes - Generic - P1109

P1109 - BARO Sensor Circuit Out of Range High

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?

P1109 Possible Causes

  • Engine Control Module (ECM) outdated or incorrect software
  • Faulty Engine Control Module (ECM)

How do I fix code P1109

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1109 code

Labor: 1.0

The cost of diagnosing the P1109 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine rough idle
  • Engine hesitation

P1109 Meaning

The Barometric Pressure (BARO) sensor is built into the Engine Control Module (ECM) and monitors atmospheric pressure. The ECM estimates appropriate intake airflow from the Manifold Absolute Pressure (MAP) sensor output voltage and BARO sensor output voltage. If the BARO sensor output voltage is a specified value or more, the ECM detects a malfunction and a code is stored.

P1109 More Information

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