bmw 2001 740il can a misfire cause a p0203 error

Question

p0203 error is bad injector -- replace and have same error

Answer 1

P0203 Injector circuit malfunction number 3 cylinder

 This is where the circuit has to be tested ,for the number 3 clylinder for any open at the harness of the injector, yes this will cause a misfire to code up also.