P3056 Code - Battery Current Sensor Circuit Malfunction
Quick Answer
The battery current sensor, which is mounted on the negative cable side of the HV battery assembly, detects the amperage that flows into the HV battery. Common causes include Faulty HV battery assembly, HV battery assembly harness is open or shorted, HV battery assembly 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
- P3056 indicates Battery Current Sensor Circuit Malfunction.
- Common causes
- Common causes include Faulty HV battery assembly, HV battery assembly harness is open or shorted, HV battery assembly 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.
Code P3056 Description
The battery ECU determines the charging and discharging amperage of the HV battery assembly based on the signals that are input to its IB terminal, and calculates the SOC (state of charge) of the HV battery through the estimation of the amperage.
What are the Possible Causes of the DTC P3056?
- Faulty HV battery assembly
- HV battery assembly harness is open or shorted
- HV battery assembly circuit poor electrical connection
- Faulty Battery current sensor
- Faulty Battery ECU
How to Fix the DTC P3056?
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 P3056 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.
Need more information about the P3056 code?
Need more information on how to fix the P3056 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P3056 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P3056 Buick — DC/DC Converter Actuator Voltage 2 Performance
- P3056 Cadillac — DC/DC Converter Actuator Voltage 2 Performance
- P3056 Chevrolet — DC/DC Converter Actuator Voltage 2 Performance
- P3056 GMC — DC/DC Converter Actuator Voltage 2 Performance
- P3056 Lexus — Battery Current Sensor Circuit Malfunction
- P3056 Toyota — Battery Current Sensor Circuit Malfunction
Frequently Asked Questions about P3056 Code
1. What are the common symptoms of OBDII code P3056 (Battery Current Sensor Circuit Malfunction)?
Common symptoms include illuminated Check Engine Light, reduced fuel efficiency, difficulty starting the vehicle, and erratic electrical system behavior.
2. What are the possible causes of OBDII code P3056?
Possible causes include a faulty battery current sensor, damaged wiring or connectors in the circuit, a weak or dead battery, or issues with the powertrain control module.
3. How can I diagnose the Battery Current Sensor Circuit Malfunction?
Diagnosis usually involves using a scan tool to read the OBDII code, inspecting the battery current sensor and related components for damage, and testing the circuit for continuity and proper voltage.
4. Can I still drive my vehicle with OBDII code P3056 present?
It is not recommended to drive your vehicle with this code present, as it can lead to potential electrical system issues and further damage if left unresolved.
5. How do I repair OBDII code P3056?
Repair typically involves replacing the faulty battery current sensor, repairing or replacing damaged wiring or connectors, and clearing the code with a scan tool.
6. Will resetting the Check Engine Light resolve OBDII code P3056?
Resetting the Check Engine Light may temporarily turn it off, but if the underlying issue causing the code is not addressed, the light is likely to come back on.
7. Can a DIY enthusiast fix OBDII code P3056 themselves?
Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this code themselves. However, it is recommended to seek professional help if unsure.
8. How much does it cost to repair OBDII code P3056 at a mechanic?
The cost of repair can vary depending on the specific cause of the code, but it may range from $100 to $300 or more, including parts and labor.
9. Are there any preventive measures to avoid OBDII code P3056 in the future?
Regularly checking and maintaining your vehicle's battery, electrical system, and sensors can help prevent issues that may trigger OBDII code P3056.
10. Can OBDII code P3056 affect the overall performance of the vehicle?
Yes, this code can affect the overall performance of the vehicle by disrupting the proper functioning of the battery current sensor, which plays a crucial role in monitoring the electrical system and battery health.
Discuss the causes and fixes for P3056 OBDII Code
-
My Chevy Malibu 2016 LT 1.5... with 10700Mi. Is throwing this code out. I took it to the Chevy dealership, they replaced the batteries light was off for about a day the moment the auto/stop/start feature started working the next morning the check engine light came back on. Reading the same code ...
-
Does your vehicle have Remote Start? There is a factory service bulletin for your model and year.
Here is more information specific for Chevrolet: P3056 CHEVROLET - DC/DC Converter Actuator Voltage 2 Performance
Read more: https://www.autocodes.com/p...
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
