If a misfire exists that exceeds the threshold value, the PCM sets DTC P0300.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Engine roughness through crankshaft speed fluctuation | 1. Poor connection 2. Ignition system 3. Fuel system 4. Intake/exhaust air system 5. Ignition timing 6. Injector 7. Bad quality fuel | |
Case 1 | Enable Conditions |
•
Engine speed is higher than 400rpm and lower than 4520rpm
•
Engine load is higher than Zero torque line | |
Threshold Value |
•
Misfire rate is greater than 3.25% pre 1000 revolutions | ||
Diagnostic Time |
•
1000 rev. | ||
MIL ON Condition |
•
3 driving cycle | ||
Case 2 | Enable Conditions |
•
Intake air temperature is higher than -8.3°C
•
Coolant temperature is higher than -8.3°C | |
Threshold Value |
•
Rate of misfire per 200 revolutions is greater than 2.5% in driving condition | ||
Diagnostic Time |
•
200 rev. | ||
MIL ON Condition |
•
Immediately (Blink) | ||
