Engine Oil Pressure Sensor Circuit Low Voltage
Indicates low voltage from the engine oil pressure sensor.
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What it means (plain English)
The engine oil pressure sensor is telling the computer it’s seeing a voltage drop below the normal range, which usually means the oil pressure is too low or there's a wiring issue.
What the computer is actually seeing
The Electronic Control Unit (ECU) is receiving a voltage signal from the oil pressure sensor that is below 0.5 volts when it should be above 0.5 volts (typically around 2.0 to 4.5 volts at normal pressure).
What a healthy reading looks like
Normal oil pressure signals should range from 0.5 to 4.5 volts, with 0.5V indicating low or no pressure and higher values indicating adequate pressure levels.
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.
- 1Check engine oil level; add oil if low and re-check
- 2Inspect wiring and connectors to the oil pressure sensor for damage or corrosion
- 3Measure the voltage at the sensor while the engine is running; it should be between 0.5 to 4.5 volts
- 4If voltage is out of range, replace the oil pressure sensor
- 5If the sensor is good and wiring is intact, check engine oil pressure using a mechanical gauge
Common causes
- Faulty oil pressure sensor
- Wiring issues (shorts or opens)
- Low engine oil level or pressure
- ECU malfunction
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s not ideal—low oil pressure can lead to serious engine damage. Get it checked soon.
Will this code come back after clearing it?
If the underlying issue isn’t fixed, yes, it will likely return once the conditions are met.
Why is this paired with other SPNs?
Often, these codes relate to the same sensor or system issues, indicating a common problem area.
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