Hi, my 2008 Zafira B started to run a bit rough and the engine management light came on, so hooked up opcom and
P0354 - Ignition Coil Cylinder 4 Circuit Malfunction (00) - Present code came up, so then cleared code and took for a drive,
engine management light did not come up this time, but every now and then a warning light of a car with spanner over it would go on then out, so i then connected opcom gain ,this time no fault registered guessing because engine management light didn't come on only the car with spanner,what is the next course if action? Thanks

On some cars the spanner symbol comes on to signify Service is pending.
Additionally, it can be to state there is a fault with the vehicle.

It may be worth clearing the Service light by following any YouTube video on how to do this

Serviced in may Opel, i brought a new Delphi coil pack and cleared code, so far so good,warning lights did not come back, need to take it on longer run to be sure.

Keep us updated on how it goes