AutoCodes – Buick – P3054 Buick

P3054 Buick Code - DC/DC Converter Actuator Voltage Sensor Circuit 2 High Voltage

Quick Answer

The Power Supply Transformer is used to boost battery voltage to sensitive loads during engine restart. Common causes include Faulty Power Supply Transformer, Power Supply Transformer harness is open or shorted, Power Supply Transformer 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: P3054 Buick indicates DC/DC Converter Actuator Voltage Sensor Circuit 2 High Voltage.
Common causes: Common causes include Faulty Power Supply Transformer, Power Supply Transformer harness is open or shorted, Power Supply Transformer 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 805

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 May 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P3054 Buick Description

The Power Supply Transformer is used to boost battery voltage to sensitive loads during engine restart. It provides two voltage outputs that provide the boosted voltage. The Power Supply Transformer communicates to the Engine Control Module (ECM). When the engine is not cranking, the Power Supply Transformer passes through voltage from the two supply circuits. The ECM receives data about the sensed output voltages provided by the Power Supply Transformer.

OBDII Code P3054 Buick - DC/DC Converter Actuator Voltage Sensor Circuit 2 High Voltage - AutoCodes.com — P3054 Buick Code - DC/DC Converter Actuator Voltage Sensor Circuit 2 High Voltage

What does this mean?

What are the Possible Causes of the DTC P3054 Buick?

Faulty Power Supply Transformer
Power Supply Transformer harness is open or shorted
Power Supply Transformer circuit poor electrical connection

How to Fix the DTC P3054 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 P3054 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 P3054 Buick Code

1. What does the OBDII code P3054 mean on a Buick?

P3054 indicates an issue with the DC/DC Converter Actuator Voltage Sensor Circuit 2, specifically detecting a high voltage condition.

2. What are the common symptoms of the P3054 code?

Symptoms may include a check engine light, reduced fuel efficiency in hybrid models, charging system issues, or erratic electrical behavior.

3. What causes the P3054 code to appear?

Common causes include a faulty DC/DC converter, damaged or corroded wiring, a defective voltage sensor, or a malfunctioning hybrid battery system.

4. How serious is the P3054 code?

This code can be serious as it may indicate high-voltage issues that could lead to electrical system damage or reduced hybrid powertrain performance.

5. Can I drive my Buick with the P3054 code?

It is not recommended to drive with this code active, as it could cause further damage to the electrical system or compromise vehicle safety.

6. How do I fix the P3054 code?

Repairs may include replacing the DC/DC converter, repairing damaged wiring or connectors, or recalibrating the voltage sensor.

7. How is the P3054 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors, test the voltage sensor, and check the DC/DC converter's operation.

8. What tools are needed to repair the P3054 code?

Repairing this code typically requires a diagnostic scan tool, a multimeter, and possibly specialized tools for hybrid system components.

9. How much does it cost to fix the P3054 code on a Buick?

Repair costs can vary widely but may range from $200 to $1,500 depending on whether the issue is wiring-related or requires replacing major components like the DC/DC converter.

10. Can a faulty battery cause the P3054 code?

Yes, a failing hybrid battery or issues with its connections can contribute to this code by affecting voltage levels within the system.