P03B8

2017-10-10

Description:

  • Cylinder 4 Pressure Too Low

Possible Symptoms:

  • Check spark plugs and replace if necessary

  • Test ignition coil for cylinder 4 and replace if faulty

  • Inspect fuel injector for cylinder 4 and clean or replace if clogged

  • Check compression in cylinder 4 and perform a compression test if necessary

Possible Causes:

  • Faulty spark plug or ignition coil in cylinder 4

  • Fuel injector clogged or malfunctioning in cylinder 4

  • Compression loss in cylinder 4 due to a leaking valve or piston rings

  • Vacuum leak near cylinder 4

  • Faulty engine control module (ECM) or engine sensor affecting cylinder 4

Related Parts:

Possible Solutions:

  • Engine misfiring and hesitation

  • Loss of power and decreased engine performance

  • Rough idle and poor engine idle quality

  • Increased fuel consumption

  • Illuminated check engine light

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