This is the symbol that will displayed on the speedo if a shifting problem occurs.
Generally the car will not start and no gears can be selected although there
have been cases where the car has driven fine despite the error showing.
If the car drives fine forwards and backwards, simply disconnect the battery for
10 minutes before reconnecting. This should clear the error from the car's memory.
What Can Cause It?
Faulty SE Drive
Poor Earth Lead
Faulty Brake Lights
Incorrect Brake Light Bulb
Faulty Gearbox RPM Sensor
Faulty Rear Light Loom (Roadster)
Faulty Gear Motor
Faulty Gear Position Sensor
Faulty Clutch Actuator
Split Reluctor Rings
Worn Clutch Fork
Solder Joint Failure
Faulty gearbox RPM sensor
This page goes into detail for each heading explaining how to fix each error.
The gear change works on non contact hall effect sensors that are activated by a magnet
(much like a reed switch but a chip format). Gear changes should be clean, smooth and full
push or pull to the limit of the stick's travel before releasing. Hesitation during a gear change
or not pushing/pulling the stick to the full limit can cause this error code to appear.
It is unlikely that the magnet will lose its power but there have been cases where the
internal PCB of the SE Drive falls down. This can put the hall effect sensors out of reach
of the magnet causing the same problem. Usually this problem can also cause the
ignition switch to move away from the barrel making the car impossible to start.
The PCB could become faulty, I don't know how exactly but electrical components in general do fail sometimes.