Engine Oil Pressure Sensor Circuit Fault
Indicates an issue with the engine oil pressure sensor or its circuit.
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 measures the oil pressure to ensure the engine is properly lubricated. If there's a fault, it could mean the oil isn't circulating well, or the sensor is broken.
What the computer is actually seeing
The engine control module (ECM) monitors voltage from the oil pressure sensor, which should range from 0.5V to 4.5V depending on pressure. A signal under 0.5V or over 4.5V indicates a fault.
What a healthy reading looks like
Normal oil pressure should register between 20 - 65 psi when the engine is running, translating to sensor voltage from 1 - 4 volts.
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 oil level; ensure it is at the proper level. If low, top up and see if the code clears.
- 22. Inspect the wiring and connections at the oil pressure sensor for damage or corrosion. Repair any issues found.
- 33. Disconnect the oil pressure sensor, and measure the voltage on the connector with the key in the ON position. If voltage is out of range (0.5V or 4.5V), go to step 4; if normal, replace the sensor.
- 44. Replace the oil pressure sensor and clear the code. Run the engine and check for oil pressure reading; if the code returns, further diagnostics on wiring or ECM may be needed.
Common causes
- Faulty oil pressure sensor
- Wiring issues in the oil pressure sensor circuit
- Low oil level or dirty oil
- Faulty engine oil pump
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It is not advisable to drive, as low oil pressure can lead to engine damage.
Will this code come back after clearing?
If the underlying issue is not fixed, the code will likely return.
Why might this code appear alongside SPN 2273?
SPN 2273 also deals with oil pressure, often indicating multiple sensor or circuit problems.
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 →