Oil Pressure Sensor Circuit Low
Indicates low input from the oil pressure sensor.
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What it means (plain English)
This code means that the oil pressure sensor is sending a voltage reading that’s lower than expected, which usually indicates low oil pressure in the engine. Normal readings should typically be between 5V to 10V when the engine is running, depending on the system.
What the computer is actually seeing
The vehicle’s computer monitors the voltage signal from the oil pressure sensor. A voltage reading below a certain threshold (usually <0.5V) for a specific amount of time (around 5 seconds) triggers this code.
What a healthy reading looks like
Oil pressure should generally be between 30 PSI and 70 PSI when the engine is at operating temperature. The oil pressure sensor output voltage should be around 1V to 4V when pressure is within normal limits.
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; it should be between the 'min' and 'max' marks. If low, add oil and see if code returns after clear.
- 22. Inspect the oil pressure sensor wiring and connector for damage, corrosion, or loose connections. Repair any issues found.
- 33. Test the oil pressure sensor with a multimeter; at normal pressure, the voltage should be 1V to 4V. If it's below 0.5V, replace the sensor.
- 44. If the sensor checks out, perform a manual oil pressure test using a mechanical gauge. Pressure should be within 30-70 PSI. If not, consider oil pump or engine issues.
Common causes
- Low oil level
- Oil pump failure
- Blocked oil passages
- Faulty oil pressure sensor
- Wiring issues (shorts or opens)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive the vehicle if this code is present, as low oil pressure can lead to severe engine damage.
Will this code come back after resetting?
If the underlying issue (like low oil pressure) isn't fixed, yes, the code will likely return.
Why does this code sometimes pair with other codes?
It often pairs with codes related to oil or engine performance issues, as they may share the same root cause.
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