2020 Mazda CX-30 Base, AWDFACTORY OEM SERVICE PROCEDURE

Knocking/Pinging-Acceleration/Cruise (Us): Notes

KNOCKING/PINGING - ACCELERATION/CRUISE (SKYACTIV-G, US) DESCRIPTION AND POSSIBLE CAUSE

Troubleshooting item Knocking/Pinging-acceleration/cruise
Description
  • Abnormal combustion occurs under the condition such as the temperature in the combustion chamber is too high resulting in abnormal noise.
  • Knocking sound occurs from the engine compartment during acceleration.
Possible cause
  • Poor fuel quality
    • Fuel RON is not specified
      • Excessive cleaning agents added in fuel
  • Poor connection of KS, wiring harness
  • The following information for calculating ignition timing is incorrect:
    • KS signal
    • ECT sensor No. 1 signal
    • ECT sensor No. 2 signal
    • IAT sensor No. 2 (integrated in MAP sensor) signal
    • MAF sensor signal
      • Air suction in intake-air system
        • MAP sensor signal
  • Combustion temperature is high
    • Cooling system malfunction
    • Carbon accumulation
      • Use of non-genuine spark plug
WARNING:
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.