P0300 - Random/multiple cylinder misfire detected
Test condition:
Modes:
a) It has been 5 seconds or more after starting.
b) The frequency of the engine speed within 440 - 6000 rpm (model with 2 sensors) and 440 - 4500 rpm (Models with 4 sensors).
c) Engine coolant temperature: above − 10°C (14°F).
d) Intake air temperature − 10°C (14°F) or more.
e) The barometric pressure above 76 kPa.
f) Perform adaptive correction control the composition of the mixture according to signal the crankshaft position sensor.
g) The engine runs, no gear, slowing down, sudden acceleration/deceleration, switching the air conditioner.
Conditions: (changes in the angular acceleration of the crankshaft are used to determine gaps in the cylinder bursts): a) the misfire occurs four or more times every 200 crankshaft revolutions (when catalyst temperature above 950 °C), and b) misfire with 20 or more once every 1000 crankshaft revolutions (corresponds to exceed 1.5 times the emission standards).
Possible cause:
- Malfunction of the ignition system;
- Incorrect signal crankshaft position sensor;
- Incorrect composition of air-fuel mixture;
- Low compression;
- Skip tooth timing belt;
- Defect EGR and EGR valve;
- Malfunction of the engine control unit.
Test condition:
Modes:
a) It has been 5 seconds or more after starting.
b) The frequency of the engine speed within 440 - 6000 rpm (model with 2 sensors) and 440 - 4500 rpm (Models with 4 sensors).
c) Engine coolant temperature: above − 10°C (14°F).
d) Intake air temperature − 10°C (14°F) or more.
e) The barometric pressure above 76 kPa.
f) Perform adaptive correction control the composition of the mixture according to signal the crankshaft position sensor.
g) The engine runs, no gear, slowing down, sudden acceleration/deceleration, switching the air conditioner.
Conditions: (changes in the angular acceleration of the crankshaft are used to determine gaps in the cylinder bursts): a) the misfire occurs four or more times every 200 crankshaft revolutions (when catalyst temperature above 950 °C), and b) misfire with 20 or more once every 1000 crankshaft revolutions (corresponds to exceed 1.5 times the emission standards).
Possible cause:
- Malfunction of the ignition system;
- Incorrect signal crankshaft position sensor;
- Incorrect composition of air-fuel mixture;
- Low compression;
- Skip tooth timing belt;
- Defect EGR and EGR valve;
- Malfunction of the engine control unit.