Torque bottom bracket sensor, signal is implausible.
Note: Bevor working on sensor contacts, unplug battery from motor.
Check the sensor plug for correct connection. Check plug, cable and sensor for mechanical damage.
Change bottom bracket for testing.
Note: The sensor signal verification happen while plug battery to motor.
Note: in rare cases, a speed sensor failure is possible. To check that, please unplug the speed sensor and reconnect the battery with bicycle. Test if the function is normal. Test also the speed sensor for short cut. The unplugged speed sensor have 3 contacts, these must not be connected. If there's a short cut the sensor is defect.
Should the failure be still present, please contact Pendix Service.