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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (On-Board Diagnostic [Engine Controls MZI 3.7] (3 Of 5)) >> DTC P0300:00 >> Notes

DTC P0300:00: Notes

WARNING: This page is about a different variant/trim than selected.
DTC P0300:00 Random misfire detected
DETECTION CONDITION 
  • The random misfire DTC indicates multiple cylinders are misfiring or the PCM cannot identify which cylinder is misfiring.
POSSIBLE CAUSE 
  • Erratic signal to PCM
    • APP sensor signal malfunction
    • ECT sensor signal malfunction
    • IAT sensor signal malfunction
    • MAF sensor signal malfunction
    • CKP sensor signal malfunction
    • TP sensor signal malfunction
    • VSS signal malfunction
    • Related connector and terminal malfunction
    • Related wiring harness malfunction
  • CMP sensor malfunction
  • CKP sensor malfunction
  • Ignition coil malfunction
  • Ignition system malfunction
  • MAF sensor contamination
  • Excess air suction in intake air system (between MAF/IAT sensor and dynamic chamber)
  • Vacuum hoses damages or improper connection
  • Fuel pump malfunction
  • Fuel pressure regulator malfunction
  • Fuel line clogged
  • Fuel filter clogged
  • Fuel runout
  • Poor quality fuel
  • Fuel leakage in fuel line
  • Insufficient compression
  • Variable valve timing control system improper operation
  • Purge solenoid valve malfunction
  • PCV valve malfunction
  • Related connector and terminal malfunction
  • Related wiring harness malfunction
  • PCM malfunction