EFI LIVE : ERROR CODE $0340Updated 2 years ago

This error code typically appears when the bypass cable is installed incorrectly.

To resolve this issue, please follow the instructions provided by the supplier on their website: http://www.fishtuning.com/CumminsBypass . It is important to follow these instructions exactly to ensure that the bypass cable is installed correctly.

After you have checked if the bypass cable was connected correctly, attempt to flash the truck again with the tunes. 

If the error code still persists...

Please fill out the support form here : Create support ticket  and send us the following information, we will take a deeper look into your issue. You may need a revised tune file.

• Year/Make/Model

• Complete VIN

• Transmission (68RFE, AISIN, G56, ALLISON)

• Transfer Case Type: Manual or SOTF

• Fuel Tank (Single or Double)

• Tire Size (GM or Chevrolet only)

• Modifications

• AutoCal Serial Number (located on the back of the device)

We appreciate your patience and understanding in this matter. If you have any further questions or concerns, please don't hesitate to reach out to us.

Once more, if the bypass cable was connected correctly and you flashed the tunes again and the error persists… please send us the information above via the support form here :  Create support ticket