P0203 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P0203 – Injector Circuit Malfunction Cylinder 3


P0203 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light),Lack/Loss of Power,The engine may be harder to start,Engine hesitation


P0203 Possible Causes


Faulty fuel injector 3,Fuel Injector 3 harness is open or shorted,Fuel injector 3 circuit poor electrical connection


P0203 Description


Engine Control Module (ECM) checks the injectors circuit resistance and monitors the voltage drop during normal operation. The ECM will trigger the P0203 code when the resistance or voltage drop at the injector 3 is out of specifications.