AutoCodes – Cadillac – P06B1 Cadillac

P06B1 Cadillac 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 Cadillac 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 454

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

What does this mean?

What are the Possible Causes of the DTC P06B1 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What does the OBDII code P06B1 mean on a Cadillac?

Code P06B1 indicates a "Sensor Supply Voltage Circuit Low Voltage," meaning the vehicle's control module has detected an issue with the voltage supplied to specific sensors.

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

Symptoms may include poor engine performance, difficulty starting the vehicle, reduced fuel efficiency, illuminated check engine light, and erratic sensor readings.

3. What causes the P06B1 code to appear on a Cadillac?

Common causes include a faulty engine control module (ECM), damaged wiring or connectors, a short or open circuit in the sensor supply voltage circuit, or a malfunctioning sensor.

4. How can I diagnose the P06B1 code on my Cadillac?

Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to check for proper voltage in the sensor supply circuit, and verify the sensors connected to the circuit are functioning correctly.

5. Can a low or dead battery cause the P06B1 code on a Cadillac?

Yes, a weak or discharged battery can contribute to low voltage issues in the sensor supply circuit and trigger the P06B1 code.

6. Is it safe to drive my Cadillac with the P06B1 code?

While the vehicle may still run, driving with this code can lead to poor performance and potentially worsen the issue. It's best to address the problem promptly.

7. How do I fix the P06B1 code on my Cadillac?

Repairs may include replacing damaged wiring or connectors, repairing any shorts or open circuits, replacing faulty sensors, or reprogramming or replacing the ECM if it's defective.

8. What tools do I need to troubleshoot the P06B1 code on a Cadillac?

Youâ€™ll need an OBDII scanner, a multimeter, and potentially wiring diagrams for your vehicle to trace the affected circuit.

9. Can a faulty ECM cause the P06B1 code on a Cadillac?

Yes, a malfunctioning ECM can fail to regulate sensor supply voltage properly and trigger this code.

10. How much does it cost to repair the P06B1 code on a Cadillac?

Repair costs can vary widely depending on the cause, ranging from $100 for minor wiring repairs to over $1,000 if the ECM needs replacement or reprogramming.