Engine Oil Pressure Sensor Circuit Low
Indicates low oil pressure signal from the engine oil pressure sensor.
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What it means (plain English)
The engine's computer expects a certain voltage level from the oil pressure sensor, usually around 1-4 volts depending on the pressure; if it sees less than that due to a fault, it triggers this code.
What the computer is actually seeing
The engine control module (ECM) sees a voltage drop from the oil pressure sensor, which indicates that oil pressure is below the safe threshold (typically below 1 volt when the engine is running).
What a healthy reading looks like
Oil pressure should be between 20-60 psi while the engine is running at normal operating temperature; the corresponding sensor voltage should be between 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.
- 1Check the engine oil level - ensure it is at the proper mark on the dipstick.
- 2Inspect wiring and connectors leading to the oil pressure sensor for damage or corrosion.
- 3Measure the voltage at the oil pressure sensor connector with the ignition on (engine off) - should read around 5 volts power in; if no voltage, check wiring back to the ECM.
- 4Start the engine and measure the voltage again at the sensor - if it's below 1 volt, this may indicate a problem with the sensor; if still a no-signal, check oil pressure manually if equipped.
Common causes
- Faulty oil pressure sensor
- Low engine oil level or oil flow
- Wiring issue (frayed or damaged wire)
- Faulty engine control module (ECM)
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive with this code?
Yes, but keep an eye on oil pressure and the engine temperature; fix it soon to avoid serious engine damage.
Will this code come back after clearing it?
Yes, if the underlying issue isn't fixed, it will likely return.
Why does this code pair with other SPN codes?
It's common for multiple system failures to trigger related codes, particularly if they share components like sensors or circuits.
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