P03AB
Cylinder 3 Pressure Sensor Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connections of the cylinder 3 pressure sensor
- Inspect the cylinder 3 pressure sensor for any damage or malfunction
- Clean or replace the cylinder 3 pressure sensor if necessary
- Check the engine control unit (ECU) for any faults related to the cylinder 3 pressure sensor circuit
- If all else fails, consider replacing the cylinder 3 pressure sensor
Common causes
Most likely first
- Faulty cylinder 3 pressure sensor
- Wiring or connection issues in the cylinder 3 pressure sensor circuit
- Low engine compression in cylinder 3
- Faulty engine control module (ECM)
- Engine misfire in cylinder 3
How to diagnose & fix
Work through it in order
- Decreased engine power
- Misfires or rough idle
- Engine hesitation or stumbling
- Poor fuel efficiency
- Illumination of the check engine light
Read & clear P03AB yourself
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