Cylinder 3 Pressure Sensor Circuit Range/Performance

Where it lives

For P03AA, the description names the sensor as the part involved. The description of P03AA puts it on cylinder 3.

Check these first

• A failing cylinder 3 pressure sensor
• Damaged or corroded wiring at the cylinder 3 sensor
• A sensor 3 installed at the wrong depth or torque
• An ECM misreading the cylinder 3 signal
• Carbon or oil fouling on the sensor 3 tip

What to do next

1. Compare cylinder 3 pressure to the other cylinders on a scan tool
2. Inspect the cylinder 3 sensor connector and wiring
3. Check the sensor 3 installation depth and torque
4. Look for oil or carbon on the sensor 3 tip
5. Replace the cylinder 3 pressure sensor if the signal reads off
6. Clear the code and retest

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