Engine Oil Pressure Sensor Circuit Low Voltage
Low voltage detected in the engine oil pressure sensor circuit.
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What it means (plain English)
The engine oil pressure sensor measures the oil pressure in the engine. If it's getting a low voltage signal (below 3 volts), the ECU thinks there's an oil pressure issue and triggers this code.
What the computer is actually seeing
The Engine Control Unit (ECU) sees a voltage reading from the oil pressure sensor that is consistently below the expected threshold, indicating low oil pressure or a sensor failure.
What a healthy reading looks like
Expected voltage from the oil pressure sensor should be between 4 to 5 volts when the engine is running at normal operating conditions.
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 oil level: Ensure it's between the minimum and maximum marks. If low, add oil and recheck for the code.
- 2Inspect wiring and connectors to the oil pressure sensor for damage or corrosion. Repair as needed.
- 3With the engine running, check the voltage at the oil pressure sensor connector; it should read 4-5 volts. If not, further investigate the circuit.
- 4If voltage is correct but the code persists, replace the oil pressure sensor and clear the code.
Common causes
- Wiring or connector issues leading to short circuits or breaks
- Faulty oil pressure sensor
- Low engine oil level or poor oil condition
- Oil pump issues affecting oil pressure functionality
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code?
Yes, but only if the oil pressure is normal as indicated by the gauge. Monitor levels closely.
Will this code come back after clearing it?
It may if the underlying issue is not fixed—especially if the sensor is faulty or there are wiring issues.
Why does this code pair with low oil pressure codes?
Low voltage in the sensor circuit can be a sign of actual low oil pressure, so both codes can indicate related issues.
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