Details On DTCs

WARNING: This page is about a different variant/trim than selected.

P0300-00: (PCM - VIN Y) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Random misfire
Detection condition	Determination conditions	Any one of the following conditions is met: The misfire rate for every 200 rotations of the crankshaft exceeds the specified value (misfire which may damage catalytic converter). The misfire rate for every 1, 000 rotations of the crankshaft exceeds the specified value (misfire going against emission regulations).
	Preconditions	Battery voltage: 9-18 V ^1 Engine speed: 500-6, 700 rpm ^1 Engine coolant temperature: -10°C {14°F} or more or 21°C {70°F} or more ^1 (standard differs depending on engine coolant temperature at engine start) Not cranking Not stalling Fuel-cut control not implemented Crankshaft installation tolerance learning completed Engine condition is stabilized (not directly after gear change) ^1 : Standard can be verified by displaying PIDs using M-MDS
	Malfunction determination period	200 rotations of crankshaft (misfire which may damage catalytic converter) 1, 000 rotations of crankshaft (misfire going against emission regulations)
	Drive cycle	2
	Self test type	CMDTC self test
	Sensor used	CKP sensor MAF sensor MAP sensor
Fail-safe	Limits intake air amount Implement fuel-cut control (if the catalytic converter may be damaged, perform fuel-cut on cylinder misfiring the most).
Vehicle status when DTCs are output	Misfiring which may damage catalytic converter (number of drive cycles: 1): Check engine light flashes and pending code is recorded Drive cycle directly after above drive cycle (number of drive cycles: 2): Malfunction determined: check engine light is illuminated Normal is determined: Pending code cleared Rough idling, poor acceleration, stalling
Possible cause	Ignition system malfunction Spark plug malfunction Ignition coil related wiring harness malfunction Ignition coil malfunction Fuel injector malfunction Improper operation of fuel injector Fuel injector related wiring harness malfunction PCM input signal error CKP sensor signal ECT sensor signal MAF sensor signal MAP sensor signal IAT sensor No. 1 signal IAT sensor No. 2 signal Boost air temperature sensor signal malfunction APP sensor signal TP sensor signal VSS signal Input signal parts connector or terminal malfunction Input signal related wiring harness malfunction EGR system malfunction Poor drive belt assembly or adhesion of oil Drive belt auto tensioner malfunction Air leakage from intake air system (between intake manifold and cylinder head) Engine mechanical system malfunction Insufficient engine compression Engine coolant leakage to combustion chamber PCM malfunction