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Home >> Toyota >> 1998 >> RAV4 Base, 4D Utility, AWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Self-Diagnostic Tests >> DTC P0401: Insufficient Exhaust Gas RECIRCULATION (EGR) Flow Detected >> Test Drive Confirmation
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Test Drive Confirmation

  1. Connect scan tool. See Figure. Start and warm engine to normal operating temperature. Operate vehicle at 38-50 MPH for 3 minutes or more. Stop vehicle and allow to idle for about 2 minutes. Turn ignition off.
  2. Start engine and allow to idle. Operate vehicle at 38-50 MPH for 3 minutes or more. Stop vehicle and allow to idle for about 2 minutes.
  3. Using scan tool, check READINESS TESTS. If COMPL is displayed on scan tool and MIL is not illuminated, system is normal. If INCMPL is displayed and MIL is not illuminated, repeat test drive procedure.
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