If there happen misfires over the threshold value at #3 cylinder, ECM/PCM sets DTC P0303.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
CKPS signal check in Engine roughness through condition | 1. Poor connection 2. Ignition system 3. Fuel system 4. Intake/exhaust air system 5. Ignition timing 6. Injector | |
Enable Conditions | Case1 |
•
510rpm ＜ Engine speed ＜ 6500rpm
•
Engine load > Zero torque line
•
Time after engine start > 0 sec.
•
ECT at start > -10 ℃
•
No rough road detection | |
Case2 |
•
510 rpm ＜ Engine speed ＜ 6500rpm
•
Engine load > Zero torque line
•
Time after engine start > 0 sec.
•
ECT at start > -10 ℃ | ||
Threshold Value | Case1 |
•
Misfire rate for E/M threshold > 3.0% | |
Case2 |
•
Misfire rate for catalyst damage > 6 ~ 20% | ||
Diagnosis Time |
•
- | ||
MIL ON Condition | Case1 |
•
2 trips | |
Case2 |
•
1 trip (Blink) | ||
