P1105 GMC Code - Secondary Vacuum Sensor Circuit
Quick Answer
The P1105 GMC code refers to an issue with the Secondary Vacuum Sensor Circuit in the vehicle. Common causes include Faulty Vacuum Sensor: The sensor itself may be faulty, sending incorrect readings to the ECM and triggering the P1105 code, Wiring Issues: Damage or corrosion to the wiring connecting the sensor to the ECM can disrupt the signal and cause a circuit malfunction, Vacuum Leaks: Any leaks in the vacuum system can affect the sensor's readings and lead to code P1105. 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 GMC indicates Secondary Vacuum Sensor Circuit.
- Common causes
- Common causes include Faulty Vacuum Sensor: The sensor itself may be faulty, sending incorrect readings to the ECM and triggering the P1105 code, Wiring Issues: Damage or corrosion to the wiring connecting the sensor to the ECM can disrupt the signal and cause a circuit malfunction, Vacuum Leaks: Any leaks in the vacuum system can affect the sensor's readings and lead to code P1105.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1105 GMC Description
The P1105 GMC code refers to an issue with the Secondary Vacuum Sensor Circuit in the vehicle. This sensor plays a crucial role in monitoring the vacuum levels in the engine, which is essential for maintaining optimal performance and fuel efficiency. When this code is triggered, it indicates a problem with the sensor circuit, which can lead to various issues with the vehicle's operation.
Common Causes of P1105 GMC
- Faulty Vacuum Sensor: The sensor itself may be faulty, sending incorrect readings to the ECM and triggering the P1105 code.
- Wiring Issues: Damage or corrosion to the wiring connecting the sensor to the ECM can disrupt the signal and cause a circuit malfunction.
- Vacuum Leaks: Any leaks in the vacuum system can affect the sensor's readings and lead to code P1105.
- ECM Malfunction: In some cases, a malfunctioning ECM can misinterpret the sensor data and trigger the code.
Symptoms of P1105 GMC
- Check Engine Light: The most common symptom associated with the P1105 code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Engine Performance: The engine may experience a decrease in power and responsiveness, making it feel sluggish or lacking in acceleration.
- Poor Fuel Economy: A malfunctioning Secondary Vacuum Sensor Circuit can lead to decreased fuel efficiency, causing the vehicle to consume more fuel than usual.
- Rough Idle: The engine may idle erratically or stall at idle due to incorrect air-fuel mixture settings caused by the sensor circuit issue.
How to Fix P1105 GMC
- Diagnose the Issue: Use a diagnostic scanner to retrieve the P1105 trouble code and perform additional tests to pinpoint the exact cause of the problem.
- Inspect Vacuum Sensor: Check the vacuum sensor for any visible damage or signs of wear. Replace the sensor if necessary.
- Check Wiring: Inspect the wiring connecting the sensor to the ECM for any breaks, corrosion, or loose connections. Repair or replace damaged wiring.
- Address Vacuum Leaks: Check the vacuum system for leaks and repair any damaged hoses or connections.
- Clear Codes: After completing the repairs, clear the trouble codes from the ECM's memory using the diagnostic scanner to reset the check engine light.
Cost to Fix P1105 GMC
The cost of repairing a P1105 GMC code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. Generally, the cost of replacing a faulty vacuum sensor can range from $100 to $200, including parts and labor. However, if additional repairs are needed, such as fixing wiring issues or addressing vacuum leaks, the total cost may increase. It's recommended to get a detailed estimate from a qualified mechanic to determine the exact cost for your vehicle, taking into account factors such as location, make and model of the vehicle, and any additional repairs required.
Need more information about the P1105 GMC code?
Need more information on how to fix the P1105 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1105 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1105 GMC Code
No Frequently Asked Questions about P1105 GMC Code found.
Discuss the causes and fixes for P1105 GMC OBDII Code
Code P1105 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.