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P1105 Buick Code - Secondary Vacuum Sensor Circuit

Quick Answer

The P1105 Buick code refers to an issue with the Secondary Vacuum Sensor Circuit. Common causes include Faulty Secondary Vacuum Sensor, Wiring issues in the sensor circuit, Vacuum leak in the system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1105 Buick indicates Secondary Vacuum Sensor Circuit.
Common causes
Common causes include Faulty Secondary Vacuum Sensor, Wiring issues in the sensor circuit, Vacuum leak in the system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1105 Buick Description

The P1105 Buick code refers to an issue with the Secondary Vacuum Sensor Circuit. This sensor is responsible for monitoring the vacuum pressure in the engine, which is crucial for the proper functioning of various systems such as the EGR (Exhaust Gas Recirculation) system and the EVAP (Evaporative Emissions Control) system.

OBDII Code P1105 Buick - Secondary Vacuum Sensor Circuit
P1105 Buick Code - Secondary Vacuum Sensor Circuit

Common Causes of P1105 Buick

  1. Faulty Secondary Vacuum Sensor
  2. Wiring issues in the sensor circuit
  3. Vacuum leak in the system
  4. ECM (Engine Control Module) malfunction
  5. Poor connections or corrosion in the sensor circuit

Symptoms of P1105 Buick

  1. Rough idling
  2. Stalling
  3. Hesitation during acceleration
  4. Decreased fuel efficiency
  5. Increased emissions levels

How to Fix P1105 Buick

  1. Diagnose the issue by using a diagnostic scanner to retrieve the trouble code and inspect the Secondary Vacuum Sensor Circuit.
  2. Check for any visible wiring issues, vacuum leaks, or sensor damage.
  3. Test the Secondary Vacuum Sensor for proper functionality.
  4. Replace the faulty sensor or repair any wiring issues as needed.
  5. Clear the trouble code from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1105 Buick

The typical repair costs for addressing a P1105 Buick code can range from $150 to $400, depending on the severity of the issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with rates typically ranging between $80 and $150 per hour. Factors such as the vehicle make and model, engine type, and location can also impact the overall repair costs. To get a more accurate estimate, it's recommended to check with local auto repair shops for specific pricing information.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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