P0203 Isuzu -

Question

How do I diagnose the reason for the P0203 code on an 1999 Isuzu Amigo. How do I check the fuel injector ?

Answer 1

HI there,

First step is to put a noid light in the #3 injector harness connector and make sure it's flashing when the engine is running. If it is, then replace the injector. If not,then you have either got an issue with the wiring to the injector or the pcm is not sending signal for the injector to fire.