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Engine-Codes – GMC – B1395 GMC

B1395 GMC Code - Control Module Voltage Reference Output 1

Quick Answer

The B1395 GMC code indicates a problem with the control module voltage reference output 1 in the vehicle. Common causes include Faulty Control Module: The control module itself may be malfunctioning, leading to voltage output issues, Wiring Problems: Damaged or corroded wiring connecting the control module to other components can disrupt the voltage supply, Bad Connection: A loose or poor connection between the control module and other modules or sensors can cause voltage output problems. 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
B1395 GMC indicates Control Module Voltage Reference Output 1.
Common causes
Common causes include Faulty Control Module: The control module itself may be malfunctioning, leading to voltage output issues, Wiring Problems: Damaged or corroded wiring connecting the control module to other components can disrupt the voltage supply, Bad Connection: A loose or poor connection between the control module and other modules or sensors can cause voltage output problems.
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 13, 2024
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Code B1395 GMC Description

The B1395 GMC code indicates a problem with the control module voltage reference output 1 in the vehicle. The control module is responsible for managing various systems in the vehicle, such as the engine, transmission, and emissions control. The voltage reference output 1 is a critical component that provides a stable voltage supply to other modules and sensors in the vehicle.

OBDII Code B1395 GMC - Control Module Voltage Reference Output 1
B1395 GMC Code - Control Module Voltage Reference Output 1

Common Causes of B1395 GMC

  1. Faulty Control Module: The control module itself may be malfunctioning, leading to voltage output issues.
  2. Wiring Problems: Damaged or corroded wiring connecting the control module to other components can disrupt the voltage supply.
  3. Bad Connection: A loose or poor connection between the control module and other modules or sensors can cause voltage output problems.
  4. Sensor Malfunction: A faulty sensor that relies on the voltage reference output 1 can trigger this code.

Symptoms of B1395 GMC

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Erratic Engine Performance: The vehicle may experience rough idling, stalling, or hesitation during acceleration.
  3. Electrical Issues: Other electrical components in the vehicle, such as lights or power windows, may not function properly.
  4. Poor Fuel Efficiency: The vehicle may consume more fuel than usual due to the inefficient operation of the control module.

How to Fix B1395 GMC

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and pinpoint the exact cause of the voltage output problem.
  2. Inspect Wiring: Check the wiring harness for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test Control Module: Test the control module to determine if it is functioning correctly. Replace if necessary.
  4. Check Sensors: Inspect sensors that rely on the voltage reference output 1 for any malfunctions. Replace any faulty sensors.
  5. Clear Codes: After completing the repairs, clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix B1395 GMC

The typical repair costs for addressing the B1395 GMC code can vary depending on the specific cause of the issue. In general, the cost of parts such as a new control module or sensors can range from $100 to $500. Labor costs at auto repair shops typically range from $80 to $150 per hour. The total cost of repairs for this issue could range from $200 to $800 or more, depending on the extent of the problem and the rates charged by the repair shop. It is advisable to obtain quotes from local auto repair shops to get a more accurate estimate based on your location and vehicle.

What does this mean?

Tech Notes for B1395 GMC

B1395:03 Control Module Voltage Reference Output Circuit Short to Ground

B1395:07 Control Module Voltage Reference Output Circuit Short to Battery or Open

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Information for Specific GMC Models

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.

Frequently Asked Questions about B1395 GMC Code

1. What are the common symptoms of OBDII code B1395 GMC?

- Common symptoms include issues with engine performance, illuminated warning lights on the dashboard, and potential stalling or rough idling.

2. What causes the OBDII code B1395 GMC to trigger?

- The code is typically triggered by a fault in the control module voltage reference output 1 circuit, such as a wiring issue, faulty control module, or a blown fuse.

3. How can I diagnose the cause of OBDII code B1395 GMC?

- To diagnose the issue, you can use a diagnostic scan tool to read the trouble codes, check the wiring connections, inspect the control module, and test the voltage output of the affected circuit.

4. Can I still drive my vehicle with OBDII code B1395 GMC?

- It is not recommended to drive the vehicle with this code active, as it can lead to potential performance issues and further damage if left unaddressed.

5. How can I repair OBDII code B1395 GMC?

- Repairing the code involves identifying and fixing the root cause, which may include repairing or replacing damaged wiring, replacing the control module, or addressing any other underlying issues.

6. Is OBDII code B1395 GMC a serious problem?

- While the severity of the issue can vary, it is important to address the code promptly to prevent potential damage to other components and ensure the vehicle operates correctly.

7. Can a DIY enthusiast fix OBDII code B1395 GMC?

- Depending on your level of expertise, you may be able to address this code yourself by following repair guides and using the necessary tools for diagnosis and repair.

8. Will resetting the trouble codes make OBDII code B1395 GMC disappear?

- Resetting the trouble codes may temporarily clear the code, but if the underlying issue is not resolved, the code is likely to reappear once the fault is detected again.

9. How much does it cost to repair OBDII code B1395 GMC at a professional mechanic?

- The cost of repairing this code can vary depending on the specific cause, but it may involve diagnostic fees, parts replacement costs, and labor charges, which can add up to a few hundred dollars.

10. Can OBDII code B1395 GMC affect other systems in the vehicle?

- Yes, unresolved issues related to this code can potentially affect other systems in the vehicle, leading to more significant problems if not addressed in a timely manner.

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