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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0402: Exhaust Gas RECIRCULATION System - Excessive Flow Detected >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport and 2002 Isuzu Rodeo. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
  2. Turn ignition on. Using scan tool, read and record FAILURE RECORDS data. Clear DTCs and monitor DTC information for DTC P0402 while operating vehicle as specified in CODE ENABLE CRITERIA  . If scan tool displays DTC P0402 FAILED THIS IGN, check for intermittent problem. See DIAGNOSTIC AIDS  . If scan tool does not display DTC P0402 FAILED THIS IGN, go to next step.
  3. Inspect exhaust system for leaks or modification of original installed parts. If problem is found, repair as necessary. After repair is complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM. If exhaust system is okay, go to next step.
  4. Remove EGR valve and check pintle, valve, passages and adapter for excessive deposits or restriction. Check EGR valve gasket and pipes for leaks. If a problem is found, clean, repair or replace components as necessary. After repair is complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM. If no problem is found, go to next step.
  5. Remove EGR inlet and outlet pipes from exhaust manifold and intake manifold. Inspect manifold EGR ports and pipes for damage, restriction or blockage. If a problem is found, clean, repair or replace components as necessary. After repair is complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM. If no problem is found, check for intermittent problem. See DIAGNOSTIC AIDS  .
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