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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 403 (Engine Control System) >> DTC P0420, P0430: Three Way Catalyst Function >> Diagnostic Procedure >> 7. Check Injector
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7. Check Injector

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch OFF.
  2. Remove injector assembly.

    Refer to FUEL INJECTOR AND FUEL TUBE .

    Keep fuel hose and all injectors connected to injector gallery.

  3. Disconnect all ignition coil harness connectors.
  4. Reconnect all injector harness connectors.
  5. Turn ignition switch ON.

    Make sure fuel does not drip from injector.

OK or NG 

  1. OK (Does not drip.):GO TO 8.
  2. NG (Drips.):Replace the injector(s) from which fuel is dripping.
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