Detection Condition
WARNING: This page is about a different car, the 2003 Mazda B4000, 2003 Mazda B3000, and 2003 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
DTCs P0201-P0206 indicates fuel injector does not operate electrically even though the harness assembly and fuel injectors test satisfactorily. DTC number indicates cylinder number. Fuel injectors are solenoid operated valves that meter fuel flow to engine. Injectors open and close a constant number of times per crankshaft revolution. Amount of fuel is controlled by adjusting injector pulse width. Injectors are normally closed and opened by 12-volt VPWR from PCM power relay. PCM controls PCM power relay ground.