Analog input of throttle signal is invalid.
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.
Check for the click sound of the microswitch in the throttle  near deacceleration state.
Change throttle for testing.

Note: this verifikation is related to a micro switch inside throttle.
Should the failure be still present, please contact Pendix Service.