FixVault
Home › Mazda › 2015 › 3 SV, Automatic Trans › Repair and Diagnosis › Engine Performance › System › On-Board Diagnostic - Engine Controls (3 Of 6) › DTC P0421 00: Catalytic Converter System › Repeatability Verification Procedure

Repeatability Verification Procedure

  1. Start the engine and leave it idling for 1 min. 
  2. Drive the vehicle normally for 15 min.  After that, shift to 3rd gear and maintain the vehicle speed at approx. 40 km/h {25 mph}. 
  3. Accelerate the vehicle to 60 km/h {37 mph}  while in 3rd gear.
  4. Release the accelerator pedal and decelerate the vehicle to 40 km/h {25 mph}. 
  5. Accelerate the vehicle to 60 km/h {37 mph}  again while in 3rd gear.
  6. Drive the vehicle for 20 s  at a speed of 50 km/h {31 mph}  while in 3rd gear.
  7. Repeat Step  4 to  6 operations above 20 times. 
    NOTE:
    • Match the engine coolant temperature in the recorded FREEZE FRAME DATA (Mode 2)/snapshot data, the vehicle speed, and engine speed values to the best extent possible while driving the vehicle.
  8. Try to reproduce the malfunction by driving the vehicle for 5 min  based on the values in the FREEZE FRAME DATA (Mode 2)/snapshot data.
About FixVault