Won't crank - not starter or battery

[PaulEd]

Over the last few weeks I am having problems starting from cold. When I turn key from inition to starter nothung happens but I get a warning saying 'Check electronic parking brake system' and the brake, handbrake and ASC lights stay on. Sometimes after a few seconds it will start but warnings stay on.

Sometimes it won't start at all. When I read the codes I get some or all of the following: P1604 Startability Malfunction, C1201 Engine Control System Malfunction, P0335 Crankshaft Position Sensor A circuit Malfunction, P0340 Camshaft Position Sensor Circuit Malfunction. When I erase all the codes it then starts.

 

It will then run fine with no warning lights all day long but nect morning the sme thing happens.

Could it be dampness in one of the loom connectors maybe?

All suggestions welcome, thanks.