What to do if the screen shows 'Error Code 2'. – HULKMAN Help Center

Why does the screen show 'Error Code 2'?

It means your car battery voltage is below 8V, and you might need to use the Force Start function.

4 Steps to use the Force Start Function:

Step 1: Insert the battery clamps into the jump starter and attach the clamps to the car battery (The screen may display “Error Code 2” or nothing).

Step 2: Press the Power Button and Flashlight Button simultaneously for 2–3 seconds to start the force output.

Step 3: Start the car engine.

Step 4: Remove the clamps from the car battery.

Note: Even though our product can restart dead batteries when the battery level of the jump starter is 20%, we still suggest you recharge the jump starter to above 80% for the best performance. When starting a completely dead battery, the car engine requires more power.

Warning: Please be cautious when using the Force Start function, as the auto-detection and safety features will be disabled. Ensure that you have a proper connection.

If you still need assistance, please contact us:

If you have checked the connection, there is no Error Code on the screen, and you still can’t start your vehicle with our product at over 80% battery power, please contact our customer support at service@hulkman.com with the following information:

Order number
The serial number of your product (Where can I find the serial number?)
Your vehicle model
Any images or videos for proof of the issue

Our agent will help you troubleshoot your issues, with the guarantee of an exemplary experience.

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