Engine Oil Pressure Sensor Circuit High
The engine oil pressure sensor is reporting higher than acceptable pressure.
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What it means (plain English)
The oil pressure sensor is measuring a pressure greater than about 55 PSI, which suggests a problem with oil flow, possibly due to a blockage or a faulty sensor.
What the computer is actually seeing
The ECM monitors the voltage signal from the oil pressure sensor, which should vary between 0.5V (low pressure) to 4.5V (high pressure). If the signal exceeds 4.5V, it triggers SPN 2380.
What a healthy reading looks like
Normal oil pressure readings should be between 20 to 55 PSI at idle and up to 70 PSI under load.
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. Add oil if it's low.
- 22. Inspect wiring and connectors to the oil pressure sensor for damage or corrosion.
- 33. Using a multimeter, check the voltage output of the oil pressure sensor. It should be between 0.5V to 4.5V based on oil pressure.
- 44. If the voltage is above 4.5V, replace the oil pressure sensor. If the sensor output is normal, check for oil flow issues and inspect the oil pump.
Common causes
- Faulty oil pressure sensor
- Blocked oil passages
- Oil pump failure
- Incorrect oil viscosity
- Wiring issues or poor connections
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
Driving with high oil pressure can cause engine damage, so it's best to address the issue promptly.
Will this code come back after repairs?
If the underlying issue is fixed, it shouldn't return.
Why does this code pair with SPN 191?
SPN 191 relates to oil pressure, and a failure in one can affect readings and conditions related to the other.
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