Engine Oil Pressure Sensor Circuit Low
The engine oil pressure sensor is reporting a low voltage condition.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Inside the engine, the oil pressure sensor measures the oil pressure to make sure it's good; if it reads low, the computer gets worried and thinks there might be less than 5 volts coming from the sensor when it should be higher, usually around 1-4 volts depending on the pressure.
What the computer is actually seeing
The engine control module (ECM) sees a voltage drop where it should expect normal values, indicating low oil pressure or a sensor issue. The output should be between 0.5V to 4.5V depending on the pressure.
What a healthy reading looks like
Normal oil pressure sensor readings should be between 1V and 3V for operational pressure in a healthy system; below 0.5V suggests a fault.
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 and condition. Top off or replace if necessary. Decision: Is oil level good? Yes: Go to step 2. No: Correct oil level and retest.
- 22. Inspect the oil pressure sensor wiring and connector for damage, corrosion, or disconnection. Decision: Is wiring intact? Yes: Go to step 3. No: Repair or replace the damaged components and retest.
- 33. Use a multimeter to measure the voltage at the oil pressure sensor connector with the engine running. Decision: Is voltage between 1V and 3V? Yes: Go to step 4. No: Replace the oil pressure sensor. Test run again.
- 44. Check oil pressure directly with a mechanical gauge if available. Decision: Is oil pressure normal? Yes: ECM may be at fault. No: Address mechanical issues such as the oil pump.
Common causes
- Faulty oil pressure sensor
- Bad wiring or loose connectors
- Low oil level or poor oil quality
- Malfunctioning oil pump
- ECM issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s moderate severity; you should fix it soon to avoid engine damage.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it will return.
Why does this code pair with SPN 1967?
SPN 1967 is usually a related circuit issue, indicating a problem with oil pressure monitoring.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →