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Home >> Fiat >> 2017 >> 500 Lounge, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (1.4L Turbo - DTCS P0271-00 To P0615-00 - 500) >> DTC Troubleshooting >> P0304-00 Cylinder 4 Misfire >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
LOW ENGINE OIL LEVEL
ENGINE OIL AERATED OR CONTAMINATED
INCORRECT ENGINE OIL FILTER
INSUFFICIENT OIL PRESSURE DUE TO A MECHANICAL FAILURE IN THE OILING SYSTEM
FAULTY IGNITION COIL OR SPARK PLUG
IGNITION COIL CONTROL CIRCUIT
FAULTY FUEL INJECTOR
EXCESSIVE CARBON BUILD-UP OR VALVETRAIN ISSUE
VARIABLE VALVE ACTUATION (VVA) SYSTEM ISSUES
ENGINE MECHANICAL/LOW COMPRESSION
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .