What engine do you have on the car; I thought your S40 should have a 5-cyl., no?richardmills2 wrote:...2 of the codes were 2 different cylinders misfiring. It just so happened that both cylinders are on the same coil...
If yes, then you have coil-over-plugs, one for each cylinder. It is (almost) impossible to mistakenly swap the electrical connectors between coils, and therefore your sparks should be timed correctly.
Once spark and correct timing are verified, I would check if the injectors are 'firing' at all. If they aren't, the 12V DC common power supply could be missing; if it is there, then it is the CPS
