Engine Oil Pressure Sensor Circuit Low Voltage
Indicates an engine oil pressure sensor has detected low voltage conditions.
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What it means (plain English)
Your engine oil pressure sensor is like a warning light that tells the computer how much oil pressure is in your engine. If the sensor sees less than about 5 volts when it should be higher, it sets this code because that might mean low oil pressure, which can damage your engine.
What the computer is actually seeing
The engine control module (ECM) expects the oil pressure sensor to output voltage within a range between 0.5V to 4.5V, with a typical value around 1.5V at idle and rising to about 4.0V when the engine is revved. If it sees values below 0.5V, it triggers this fault code.
What a healthy reading looks like
0.5V to 4.5V (greater than 1.0V expected at idle)
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 first; it should be between the minimum and maximum marks on the dipstick. If it's low, add oil and recheck the code after a drive cycle.
- 2Inspect the oil pressure sensor wiring and connector for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- 3Use a multimeter to check the voltage at the oil pressure sensor connector with the key on and the engine off; you should see a voltage reading of about 5V. If you don’t, check the wiring back to the ECM.
- 4Start the vehicle and check the voltage at the oil pressure sensor again; it should be in the range of 0.5V to 4.5V with the engine running. If it’s outside this range, swap the oil pressure sensor and retest.
Common causes
- Faulty oil pressure sensor
- Wiring issues (shorts or opens)
- Low engine oil level
- Faulty engine oil pump
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, it's not safe to drive. Low oil pressure can severely damage the engine.
Will this code come back after I clear it?
If the underlying issue isn't fixed, such as replacing a bad sensor or fixing wiring, the code will likely return.
Why does this code sometimes pair with other codes?
Often, other sensors depend on proper oil pressure readings, so a failure can trigger multiple codes related to engine function.
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