Engine Oil Pressure Sensor Voltage Low
Low voltage signal from the engine oil pressure sensor detected.
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What it means (plain English)
The engine oil pressure sensor is sending a voltage signal below the expected range, suggesting low oil pressure or a faulty sensor.
What the computer is actually seeing
The engine control unit (ECU) expects the oil pressure sensor signal to be above a certain voltage threshold, typically above 0.5 volts when oil pressure is adequate.
What a healthy reading looks like
Normal oil pressure should correspond to 0.5V to 4.5V depending on engine condition and RPM; less than 0.5V indicates a problem.
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—ensure it's within the manufacturer’s specified range; top off if low.
- 22. Inspect the wiring and connectors leading to the oil pressure sensor—look for frays, corrosion, or loose connections.
- 33. Disconnect the oil pressure sensor and check its resistance using a multimeter; it should typically have a range of 10 to 150 ohms.
- 44. Reconnect the sensor and check the voltage at the sensor connector with the engine running; it should produce a voltage between 0.5V and 4.5V depending on oil pressure.
- 55. If voltages are below 0.5V with good oil level and wiring, replace the oil pressure sensor.
Common causes
- Faulty oil pressure sensor
- Low engine oil level
- Oil flow restrictions
- Wiring or connector issues to the sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity indicates you can drive short distances, but address this issue soon to avoid engine damage.
Will this code come back after clearing?
If the underlying issue isn’t fixed, the code will likely return, especially if the sensor or oil pressure issues persist.
Why does this code pair with SPN 1508?
SPN 1508 indicates actual oil pressure is low, which may be the cause of the low voltage from the sensor.
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