DTC P0300:00 [MZI-3.7]: Notes
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| 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 |
- 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
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