OK P1201 is a cylinder1 misfire
p1271 is ambient air temp sensor fault
P1278 is injector fault cylinder 3
p1281 is a general misfire
Its likely that the faulty injector is creating the P1281 code so I'd begin by checking the wiring to the injectors looking for damaged insulation and corroded contacts
I'd also suggest to check for a lack of fuel pressure from the electrical pump at the tank.
1st thing to try is to remove the fuel filler cap and then flick the ignition on whilst listening for the brief ‘buzz’ of the pump
If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,
Ideally measure the pressure at the injector rail (should usually be around 3Bar / 45psi +) and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.