P0303

DTC P0300 / P0301 / P0302 / P0303 / P0304 / P0305 / P0306: Misfire Detected

System Description
ECM 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 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:
Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
- Atmospheric pressure: higher than 75 kpa (560 mmHg) (Altitude: lower than 2790 m (9150 ft)).
- Engine coolant temperature: higher than -10 °C (14 °F).
- Make sure that the ignition timing is good referring to Ignition Timing Inspection.

1. With ignition switch OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC by using scan tool if any.
3. Drive vehicle more than 37 mph (60 km/h) for more than 1 minute.
4. Stop vehicle and check DTC and pending DTC by using scan tool.

Step 1-7:

Step 8-10:

DTC Troubleshooting