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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 >> 1. Check Exhaust System

1. Check Exhaust System

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.

Visually check exhaust tubes and muffler for dent.

OK or NG 

  1. OK: GO TO 2.
  2. NG: Repair or replace.
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