|
|
EC-334 [QG (WITH EURO-OBD)] DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS- FIRE DTC P0300 - P0304 MULTIPLE CYLINDER MISFIRE, NO. 1 - 4 CYLINDER MIS- PFP:00000 On Board Diagnosis Logic EBS00QMZ When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank- The misfire detection logic consists of the following two conditions. 1. One Trip Detection Logic (Three Way Catalyst Damage) 2. Two Trip Detection Logic (Exhaust quality deterioration) DTC Confirmation Procedure EBS00QN0 CAUTION: Always drive vehicle at a safe speed. NOTE: Sensor Input Signal to ECM ECM function Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0300 Multiple cylinder misfire Multiple cylinder misfire. ● Improper spark plug ● Insufficient compression ● Incorrect fuel pressure ● The injector circuit is open or shorted ● Fuel injectors ● Intake air leak ● The ignition signal circuit is open or ● Lack of fuel ● Drive plate or flywheel ● Heated oxygen sensor 1 ● Incorrect PCV hose connection P0301 No.1 cylinder misfire No. 1 cylinder misfires. P0302 No. 2 cylinder misfire No. 2 cylinder misfires. P0303 No. 3 cylinder misfire No. 3 cylinder misfires. P0304 No. 4 cylinder misfire No. 4 cylinder misfires. |