DTC P0300 Random/Multiple Cylinder Misfire Detected: DTC Detecting Condition
DTC DETECTING CONDITION CHART
| Item |
Detecting Condition |
Possible Cause |
| DTC Strategy |
- Calculation of engine roughness
|
- Faulty spark plugs, high-tension lead, or Ignition coil
- Incorrect valve timing
- Uneven compression
- Air leakage
- Improper Fuel pressure or dirty fuel.
- Blocked/Leaking injectors
- Leakage between cooling system and cylinder
|
| Enable Conditions |
- 170 < Mass air flow (mg/rev.) < 460
- 512 < Engine speed (RPM) < 6500
- 40 < MAF gradient (mg/rev/Seg.) < 400
- 140 < Throttle gradient (°TPS/sec.) < 200
- Coolant temperature > 20°C (-4°F) if Start temperature < -7°C (19.4°F)
- No rough road
- No relevant failure
- 11V < Battery voltage
- Fuel cut off not active
|
| Threshold Value |
- Misfire detected on 2 or more cylinders
|
| MIL On Condition |
- When misfire rate is high enough to damage the catalyst : Immediate
- When emissions level to exceed standard value : 2 Driving Cycles
|