P03B4

2017-10-10

Description:

  • Cylinder 4 Pressure Sensor Circuit Range/Performance

Possible Symptoms:

  • Check for any loose or damaged connections to the cylinder 4 pressure sensor

  • Inspect and replace the cylinder 4 pressure sensor if necessary

  • Check the wiring harness for any frayed or damaged wires, and repair or replace as needed

  • Inspect and clean the intake manifold and throttle body

  • Perform a compression test to ensure proper cylinder 4 pressure

Possible Causes:

  • Faulty cylinder 4 pressure sensor

  • Loose or damaged wiring connections in the cylinder 4 pressure sensor circuit

  • Engine misfire in cylinder 4

  • Low fuel pressure in cylinder 4

  • Issues with the engine control module (ECM) related to cylinder 4 pressure sensor readings

Related Parts:

Possible Solutions:

  • Decreased engine performance or power

  • Engine misfires or runs rough

  • Difficulty starting the engine

  • Illumination of the check engine light

  • Poor fuel efficiency

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