Engine Oil Pressure Sensor Voltage Low
Indicates low voltage reading from the engine oil pressure sensor.
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)
The engine’s computer is not getting enough voltage from the oil pressure sensor, meaning it thinks the oil pressure is too low.
What the computer is actually seeing
The ECM (Engine Control Module) sees a voltage reading usually below 0.2 volts from the oil pressure sensor when it should be around 0.5 to 4.5 volts at normal oil pressure.
What a healthy reading looks like
Expected oil pressure sensor voltage should be between 0.5 to 4.5 volts, depending on the actual oil pressure and the specific engine design.
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 oil level and condition; ensure it's at the right level and not contaminated. Decision: If low, fill to specification and retest. If satisfactory, proceed to the next step.
- 22. Inspect wiring and connectors at the oil pressure sensor for damage or corrosion. Decision: If damaged, repair or replace the wiring and retest. If good, proceed to the next step.
- 33. Measure voltage at the oil pressure sensor connector with the key on (engine off), should read 0.5 to 4.5 volts. Decision: If outside this range, replace the sensor. If within range, proceed to the next step.
- 44. Check the resistance of the oil pressure sensor; typically, it should show a specific resistance value depending on the pressure. Decision: If resistance is incorrect, replace the sensor. If correct, suspect an issue with the ECM.
Common causes
- Faulty oil pressure sensor
- Wiring issues (shorts, opens, corrosion)
- Low oil level
- Oil pump failure
- ECM malfunction
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive the vehicle safely?
It's best to address this code soon, as low oil pressure can lead to engine damage.
Will this code come back after I clear it?
If the issue is not fixed (e.g., faulty sensor, wiring), it will likely return.
Why did this code appear with another code?
Related codes often indicate a systemic issue, such as a failing sensor or oil pump affecting overall engine operation.
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