Cylinder 4 Pressure Sensor Circuit High

Common symptoms

What you'll notice

• Check and replace the spark plug in cylinder 4
• Inspect and replace the ignition coil for cylinder 4
• Verify and replace the fuel injector for cylinder 4
• Test and replace the engine control module (ECM) if necessary
• Inspect and repair any wiring or connections related to the cylinder 4 pressure sensor circuit

Common causes

Most likely first

1. Faulty cylinder 4 pressure sensor
2. Wiring or connection issue with the cylinder 4 pressure sensor circuit
3. Engine control module (ECM) malfunction or programming error
4. Internal engine problem affecting cylinder 4, such as a valve issue or compression problem
5. Faulty fuel injector for cylinder 4

How to diagnose & fix

Work through it in order

1. Engine misfires or runs rough
2. Decreased power or acceleration
3. Poor fuel efficiency
4. Engine stalling or hesitation
5. Check Engine Light illuminated