The automobile fault code P1109 indicates a problem with the Engine Control Module (ECM) software or a faulty ECM. This can result in symptoms such as the engine light being on, rough idle, and engine hesitation.

To fix this issue, you should visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded pins on the connectors.

The repair time for this issue is estimated to be around 1.0 hour. It is important to address this problem promptly to prevent further damage to the engine.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level6.67 (Out of 10)

If you’re experiencing an illuminated engine light, rough idle, and engine hesitation, you may be dealing with the p1109 fault code.

  • The fault code P1109 may be indicated by the following symptoms: Engine Light ON (or Service Engine Soon Warning Light), engine rough idle, and engine hesitation.

The automobile fault code p1109 can be caused by outdated or incorrect software in the Engine Control Module (ECM) or a faulty ECM.

  • The fault code p1109 can be caused by the following: outdated or incorrect software in the Engine Control Module (ECM) and a faulty Engine Control Module (ECM).

To fix the p1109 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1109, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
  • The estimated repair time for this fix is 1.0 hour.

The factors influencing the diagnosis and fixing cost of the automobile fault code p1109 are the estimated repair time and the hourly rate charged by auto repair shops. The estimated repair time for this fault code is 1.0 hour. Auto repair shops typically charge between $75 and $150 per hour for their services.

These factors will determine the overall cost of diagnosing and fixing the p1109 fault code.

The P1109 fault code refers to a problem with the Barometric Pressure (BARO) sensor in the Engine Control Module (ECM). This sensor is responsible for monitoring atmospheric pressure.

The ECM uses the BARO sensor output voltage, along with the Manifold Absolute Pressure (MAP) sensor output voltage, to estimate the appropriate intake airflow. When the BARO sensor output voltage exceeds a specified value, the ECM detects a malfunction and stores the P1109 code. This means that the BARO sensor circuit is out of range on the high side.

It indicates that there is an issue with the sensor or its wiring, which needs to be addressed to ensure proper engine performance.

What are the possible causes of fault code P1109 in an automobile?

If you’re experiencing an engine light on or a service engine soon warning light, along with a rough idle and engine hesitation, fault code P1109 might be the culprit. This code can be caused by an outdated or incorrect software in the Engine Control Module (ECM) or a faulty ECM itself. To fix this issue, start by visually inspecting the wiring harness and connectors. Look out for any damaged components and check for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the wiring harness and connectors to fix fault code P1109?

To fix fault code P1109, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check if there are any broken, bent, pushed out, or corroded pins in the connectors. This can help identify any issues with the wiring that may be causing the engine light to come on, as well as engine rough idle and hesitation. Make sure to also check for outdated or incorrect software in the Engine Control Module (ECM) and replace it if necessary.

What should I look for when checking for damaged components or corroded connector pins to resolve fault code P1109?

When resolving fault code P1109, it is important to check for damaged components or corroded connector pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any broken, bent, pushed out, or corroded pins. These issues can cause symptoms such as engine light being on, rough idle, and engine hesitation. By addressing these potential causes, such as outdated or faulty Engine Control Module (ECM) software, you can effectively resolve the issue.

p1109 error fault code explained

If you’re experiencing engine light on, rough idle, and engine hesitation, the culprit could be the outdated or incorrect software in the Engine Control Module (ECM) or a faulty ECM.

To fix this, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.

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