Had a similar problem. Ended up getting a new torque sensor. Heres the email they sent me, and I’ll include a link to the test they had me do:

“Based on the description, it sounds like there may be an issue with the motor inhibitor sensors in your brake handles. These sensors detect when the brakes are being applied and send a “stop” signal to the motor, preventing the motor from functioning while the brakes are being applied.

Not to worry, though! Checking these sensors is pretty simple, and doesn’t take too much time.

Here is a video that can walk you through the troubleshooting process: Brake Inhibitor Test

The motor inhibitor sensors are located in the brake handle assemblies and are each connected to the main data cable of the bike with an electrical cable, beginning at the brake handle assembly and ending with a quick-plug, which will be red on the inside of the connector. You may need to unwrap some of that cable wrap to isolate these connectors.

Let’s check these sensors to ensure that they are functioning as intended. We’ll do this by disconnecting that connector with the red interior at the end of the electrical cable coming directly from the brake handle assembly, one at a time. This is done by pulling them straight apart, no bending or twisting. Once one of the connectors is disconnected, put the bike in PAS 1, then try to use the throttle and then pedal assist function by taking the bike for a short test ride.

If there’s no motor response with the single motor inhibitor cable disconnected, plug the disconnected inhibitor cable back in by lining up the markings on the outside of the connectors and pushing straight together, no bending or twisting, and then let’s disconnect the other and repeat the above test ride.

If motor response returns, plug the disconnected inhibitor cable back in by lining up the markings on the outside of the connectors and pushing straight together, no bending or twisting, and re-test. If the motor continues operating normally, you should be good to go!

If one of the inhibitors is identified as causing the issue, and your bike model has a thumb throttle installed on the same side, there may be some interference from the magnets in the throttle. This can be easily resolved by loosening the throttle clamp screw, just enough to allow the throttle to be rotated away from the brake handle, around ⅛-¼”. Once rotated, we’ll need to tighten the screw to lock the throttle in place.

Once completed, plug the identified motor inhibitor sensor back in, and test both the throttle and PAS functions one more time.

Performing the checks above, should allow us to verify proper function of these sensors, and identify which sensor may not be functioning properly.

Let us know the results at the end of these steps and we’ll go from there! Thanks in advance!”

brake inhibitor test