OBD II Fault Code P0203 :

Description of Fault code P0203

NO.3 INJECTOR CIRCUIT OPEN

Possible failuer P0203

• Injector No.3 harness (High side open, low side open)
• Injector No.3 (Internal open)
• Engine Control Module (ECM) internal failure (Internal open)

Diagnostic Procedure using AutoHex II Scan Tool

• When the injector drives, the abnormal pattern of the voltage and the current flow is detected by the injector drive LSI (the Engine Control Module (ECM) internal) for a set period of time.

Test Conditions using AutoHex tester

• Engine running.
• Once each Cam Revolution

Clear Fault codes Conditions

• When the injector drives, the abnormal pattern of the voltage and the current flow is detected by the injector drive LSI (the Engine Control Module (ECM) internal) for a set period of time.

MIL Status

• Check Engine Light ON

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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