P03BD
Cylinder 5 Pressure Sensor Circuit
What it means
P03BD means Cylinder 5 Pressure Sensor Circuit.
Where it lives
For P03BD, the sensor sits on the circuit this code reports. The description of P03BD puts it on cylinder 5.
Check these first
- A failed cylinder 5 pressure sensor
- Damaged wiring or a connector at the cylinder 5 sensor
- An open or short in the sensor 5 circuit
- An ECM that cannot read the cylinder 5 signal
- Corrosion at the cylinder 5 sensor connector
What to do next
- Check the cylinder 5 pressure signal on a scan tool
- Inspect the sensor 5 connector and harness for damage
- Test the sensor 5 circuit for an open or short
- Measure the sensor 5 resistance against spec
- Replace the cylinder 5 pressure sensor if the circuit tests good
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.