Hi all. New member here, I have purchased a carerra subway e bike second hand, it has had light use and is still like new. i have ridden it a few times to work and back and one occasion it was raining, since then, when i turn it on it gives a jolt to the motor, causing the bike to move forward slightly for a split second, which it wasnt doing before, also, sometimes, it will want to keep going on its own, without touching the pedals, also if i lean to the left and circle round it rides on its own, intermittantly. I have removed the torque sensor and it is clean with no damage or loose wiring inside, as are the cogs, also the wiring at the steering is all still new, no damage or wear. When i rode it immediately after putting the sensor back in place, it gave error 22, since then it has not given error 22 yet the initial problems remain. Can anybody help on what to do next? I literally spent all my money on it and cant afford to take it to a shop unfortunately.