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Home >> Isuzu >> 2000 >> Rodeo S, 2.2 D >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Trouble Code Identification >> DTC P0402: Excessive EGR Flow Detected >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic II (OBD-II) system check. See SELF-DIAGNOSTICS - INTRODUCTION article. Go to next step.
  2. Turn ignition on. Using scan tool, read and record FAILURE RECORDS data. Operate vehicle as specified in DIAGNOSTIC AIDS . Using scan tool, monitor specified DTC information for DTC P0402. If scan tool displays DTC P0402 FAILED THIS IGN, go to next step. If scan tool does not display DTC P0402 FAILED THIS IGN, see DIAGNOSTIC AIDS .
  3. Inspect exhaust system for modification of original installed parts or leaks. Repair as necessary. 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, repair as necessary. If no problem is found, go to next step.
  5. Remove EGR inlet and outlet pipes from the exhaust manifold and intake manifold. Inspect manifold EGR ports and pipes for damage, restriction or blockage. Repair or replace as necessary. If repair is not needed, see DIAGNOSTIC AIDS .
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