My 2009 MKII Octavia VRS TDI (engine code CEGA) has had an intermittent issue with the crankshaft sensor for the last few months.

The issues are that when I try and start the car it will Kick into life before stalling with the battery light coming on. If I do get the car running then it will seemingly randomly do it as it’s driving. Alongside this the glow plug will Flash and the check engine light comes on (although these don’t happen every time). All Which reset with a key cycle.

You can also feel and see the cars revs dropping just before the car cuts out and stalls.

When reading the error codes on an OBDII reader I get the following error codes:

• P0322 - ignition/distributer engine speed input circuit no signal

• P0321 - ignition/ distributor engine speed circuit range/perfomance

So far I have had the crankshaft sensor replaced (with an OEM sensor) and had the wiring loom inspected and replaced.

To make the issue more annoying after having the wiring replaced the car ran fine for over 500miles before coming back

Alongside this I have a cluster of lights out on the dash, on the speedometer from 70mph onwards the lights don’t turn on. Which i’m unsure if it’s related to the issue or not.

Anyone have any ideas of what the best next step would be

Might be dirt/debris on reluctor ring so the sensor isnt picking it up properly or perhaps a bad relay in engine bay. On my old octavia it was I think marked 109/458 (cant remember but it fed ECU and engine sensors)