AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Cadillac - P3056 Cadillac

P3056 Cadillac Code - DC/DC Converter Actuator Voltage 2 Performance

- Code Popularity: 1,773 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P3056 Cadillac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Power Supply Transformer
  • Power Supply Transformer harness is open or shorted
  • Power Supply Transformer circuit poor electrical connection
⚠ Does your Cadillac have Safety Recalls? → Check here

How to Fix the DTC P3056 Cadillac?

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

Search for P3056 Cadillac Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P3056 Cadillac code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P3056 Cadillac 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 P3056 Cadillac - DC/DC Converter Actuator Voltage 2 Performance - AutoCodes.com
P3056 Cadillac Code - DC/DC Converter Actuator Voltage 2 Performance

Need More Information on the Code?

Need more information on how to fix the P3056 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P3056 Cadillac code diagnosed by a professional: Find a repair shop in your area

Code P3056 Cadillac comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P3056 Cadillac code? Have you replaced any parts?
Any information is appreciated. Thanks