AutoCodes – Buick – P06B1 Buick

P06B1 Buick Code - Sensor Supply Voltage Circuit Low Voltage

Quick Answer

The generator control module, also called the starter/generator control module is comprised of the following three control modules: the hybrid/EV powertrain control module 1, the 14 V power module, and the drive motor control module. Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module circuit poor electrical connection. 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: P06B1 Buick indicates Sensor Supply Voltage Circuit Low Voltage.
Common causes: Common causes include Faulty Starter/Generator Control Module, Starter/Generator Control Module harness is open or shorted, Starter/Generator Control Module circuit poor electrical connection.
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.

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Code Popularity 398

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P06B1 Buick Description

The generator control module, also called the starter/generator control module is comprised of the following three control modules: the hybrid/EV powertrain control module 1, the 14 V power module, and the drive motor control module. These three control modules are non-serviceable and are part of the generator control module.
The drive motor control module uses an internal 15 V reference power supply in order to operate the drive motor sensors and processor. This fault is handled inside the generator control module and no external circuits are involved.
The Diagnostic Trouble Code (DTC) will be set when the reference voltage is less than 8.8 V for 1 second.

OBDII Code P06B1 Buick - Sensor Supply Voltage Circuit Low Voltage - AutoCodes.com — P06B1 Buick Code - Sensor Supply Voltage Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P06B1 Buick?

Faulty Starter/Generator Control Module
Starter/Generator Control Module harness is open or shorted
Starter/Generator Control Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P06B1 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P06B1 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.

Frequently Asked Questions about P06B1 Buick Code

1. What does code P06B1 mean on a Buick?

Code P06B1 indicates a "Sensor Supply Voltage Circuit Low Voltage," meaning the power supply to one or more sensors is below the expected range.

2. What are the common symptoms of P06B1 on a Buick?

Symptoms may include the check engine light turning on, poor engine performance, erratic sensor readings, or difficulty starting the vehicle.

3. What causes the P06B1 code to appear?

Potential causes include a faulty sensor, damaged wiring, a corroded connector, a malfunctioning powertrain control module (PCM), or an issue with the sensor supply voltage circuit.

4. How do I diagnose the P06B1 code on a Buick?

Start by checking the wiring and connectors for damage or corrosion, testing the voltage supply to the affected sensors, and using an OBDII scanner to identify related sensor faults.

5. Can I drive my Buick with the P06B1 code active?

Driving with P06B1 is not recommended as it could lead to poor performance, reduced fuel efficiency, and potential damage to engine components.

6. How is the P06B1 code fixed on a Buick?

Repairs may involve replacing a faulty sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the PCM if needed.

7. Is P06B1 a common issue in Buick vehicles?

While not extremely common, it can occur in older or higher-mileage Buick models, particularly if electrical components have degraded over time.

8. How much does it cost to fix the P06B1 code on a Buick?

Repair costs vary depending on the cause but typically range from $100 to $500, including parts and labor, with PCM replacement being on the higher end.

9. What sensors are affected by the P06B1 code?

The sensors affected can vary but often include critical ones like the MAP sensor, MAF sensor, or throttle position sensor.

10. Can a weak battery cause the P06B1 code on a Buick?

Yes, a weak or failing battery can result in low voltage, potentially triggering the P06B1 code. Always ensure the battery and charging system are functioning properly.