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Home >> Mazda >> 2017 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (2 Of 5) >> DTC P0401-00; EGR Flow Insufficient Detected >> Repeatability Verification Procedure

Repeatability Verification Procedure

CAUTION:
  • When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
  • While performing this step, always operate the vehicle in a safe and lawful manner.
  1. Start the engine at the engine cold condition.
  2. Confirm that the low engine coolant temperature indicator light (blue) illuminates.
  3. Drive the vehicle for 1 min at a speed of 50 km/h {32 mph} or more.
  4. Repeat Step  3 operation above 2 times.
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