Engine Oil Pressure Sensor Circuit Low
The engine oil pressure sensor is reading a low voltage signal.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine oil pressure sensor is sending a signal indicating that the oil pressure is too low, which can cause serious engine damage if not addressed immediately.
What the computer is actually seeing
The computer expects a voltage signal between 0.5V to 4.5V from the oil pressure sensor. A reading below about 0.5V indicates low oil pressure.
What a healthy reading looks like
Normal oil pressure is typically between 20 PSI (0.5V) to 80 PSI (4.5V); values below 5 PSI trigger the warning.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the engine oil level. Add oil if below the minimum mark. Then, recheck the sensor reading.
- 22. Inspect wiring and connectors leading to the oil pressure sensor for damage, corrosion, or loose connections. Repair as needed.
- 33. Use a multimeter to test the voltage from the oil pressure sensor harness. A normal reading should be between 0.5V and 4.5V; if it's lower, replace the sensor.
- 44. If the sensor is replaced, run the engine and monitor oil pressure via a mechanical gauge to confirm the issue, checking that the gauge reads a minimum of 20 PSI.
Common causes
- Faulty oil pressure sensor
- Low oil level
- Oil pump failure
- Blocked oil passages
- Electrical issues (broken wire or bad connector)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
No, low oil pressure can lead to severe engine damage. Address this issue immediately.
Will the code come back after repairs?
If the root cause is fixed and the sensor is calibrated correctly, the code should not return.
Why does this code appear along with low oil level?
Low oil level can cause low oil pressure readings, triggering this code.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →