Cylinder 5 Pressure Sensor Circuit Intermittent/Erratic

Common symptoms

What you'll notice

• Check and replace the cylinder 5 pressure sensor
• Inspect and repair any loose or damaged wiring connections related to the sensor circuit
• Verify and rectify any issues with the sensor circuit's power supply and ground connections
• Update or reprogram the engine control module (ECM) software to ensure proper communication with the sensor
• If all else fails, consider replacing the ECM itself

Common causes

Most likely first

1. Loose or damaged wiring or connectors in the cylinder 5 pressure sensor circuit
2. Faulty cylinder 5 pressure sensor
3. Engine misfire in cylinder 5
4. Low fuel pressure in cylinder 5
5. Faulty Engine Control Unit (ECU) or Powertrain Control Module (PCM)

How to diagnose & fix

Work through it in order

1. Rough or uneven engine idle
2. Engine misfires or hesitation during acceleration
3. Decreased engine power or performance
4. Illuminated check engine light
5. Poor fuel efficiency