P0309

2017-10-10

Description:

  • “The fault code P0309 indicates that there is a misfire detected in cylinder 9 of the engine. This may cause the engine to run poorly or not start at all.”

Possible Symptoms:

  • Illuminated check engine light

  • Engine runs poorly or not at all

  • Rough idle or stalling

  • Reduced engine power or acceleration

  • Increased fuel consumption

Possible Causes:

  • Failed ignition coil in cylinder 9

  • Faulty spark plug in cylinder 9

  • Low fuel pressure

  • Clogged fuel injector in cylinder 9

  • Vacuum leak in cylinder 9

  • Compression loss in cylinder 9

Related Parts:

  • Crankshaft Position Sensor: The crankshaft position sensor monitors the position of the crankshaft to regulate fuel injection. Problems lead to engine misfire and engine stalling

Possible Solutions:

  • Replace the ignition coil in cylinder 9

  • Replace the spark plug in cylinder 9

  • Check and repair any issues with fuel pressure

  • Clean or replace the fuel injector in cylinder 9

  • Check and repair any vacuum leaks in cylinder 9

  • Repair any compression issues in cylinder 9

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