P0300

DTC P0300: Misfire Detected

System Description
ECM (PCM) measure the angle of the crankshaft based on the pulse signal from the CKP sensor and CMP sensor for each cylinder. If it detects a large change in the angle speed of the crankshaft, it concludes occurrence of a misfire. When the number of misfire is counted by ECM (PCM) beyond the DTC detecting condition, it determine the cylinder where the misfire occurred and output it as DTC.

DTC Detecting Condition And Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.

NOTE:
- Make sure that DTC P0335 and P0340 are not detected when performing this "DTC Confirmation Procedure".
- Make sure that the ignition timing is good referring to Ignition Timing Check and Adjustment.

1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC by using scan tool if any.
3. Operate vehicle within freeze frame data condition as noted for 1 min.
4. Stop vehicle and check DTC and pending DTC by using scan tool.

Step 1 - 4:

Step 5 - 11:

DTC Troubleshooting