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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 145 (On-Board Diagnostic - Engine Control (2 Of 5)) >> DTC P0300; Pcm Random Misfire Detected >> Repeatability Verification Procedure

Repeatability Verification Procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drive the vehicle at a speed of 40 km/h {25 mph} or more.
  2. Shift to 3rd gear and rapidly accelerate the vehicle to 60 km/h {37 mph}(to execute misfire monitor).
  3. Release the accelerator pedal and decelerate the vehicle to 40 km/h {25 mph}.
  4. Repeat Step  1 to  3 operations above 5 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.
  5. 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.
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