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Home >> Toyota >> 1996 >> Corolla Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Tests W/Codes - 1.8L) >> Circuit Tests >> DTC P0401 - Insufficient Exhaust Gas RECIRCULATION (EGR) Flow Detected >> Test Drive Confirmation
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Test Drive Confirmation

WARNING: This page is about a different variant/trim than selected.
  1. Connect scan tester. See Figure. Start and warm engine to normal operating temperature. Operate vehicle at 43-56 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 43-56 MPH for 3 minutes or more. Stop vehicle and allow to idle for about 2 minutes.
  3. Using scan tester, check READINESS TESTS. If COMPL is displayed on scan tester 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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