P1109 Possible Causes
- Engine Control Module (ECM) outdated or incorrect software
- Faulty Engine Control Module (ECM)
How is the P1109 code repair?
Start by checking 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.What is the cost to diagnose the P1109 code
Labor: 1.0
The cost to diagnose 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.
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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.More Information
Need more information on how to fix the P1109 code?Get Access to Factory Service Manuals
Information for specific makes
- P1109 ACURA BARO Sensor Circuit Out of Range High
- P1109 AUDI HO2S22 Sensor Circuit Voltage Too Low Air Leak
- P1109 BUICK Secondary Port Throttle System
- P1109 CADILLAC Secondary Port Throttle System
- P1109 CHEVROLET Secondary Port Throttle System
- P1109 FORD IAT Sensor 2 Intermittent Condition
- P1109 GMC Secondary Port Throttle System
- P1109 HONDA BARO Sensor Circuit Out of Range High
- P1109 HYUNDAI Fuel Pump - Abnormal
- P1109 VOLKSWAGEN HO2S22 Sensor Circuit Voltage Too Low Air Leak