Engine Oil Pressure Sensor Circuit High
Oil pressure sensor is reporting a value above normal range.
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What it means (plain English)
The engine oil pressure sensor is detecting pressure that's too high, possibly due to a blocked oil passage or a faulty sensor.
What the computer is actually seeing
The ECM sees a voltage reading from the oil pressure sensor that is consistently above the predetermined threshold, usually over 7.25 volts.
What a healthy reading looks like
Normal oil pressure should be between 10-30 psi at idle and above 30 psi during acceleration.
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; add oil if low.
- 22. Inspect wiring and connector to the oil pressure sensor for damage or corrosion. Repair as needed.
- 33. With the engine running, use a scan tool to monitor oil pressure readings. If above 7.25 volts, proceed to the next step.
- 44. Disconnect the sensor and check for voltage at the connector with a digital multimeter; it should remain within 0-5 volts. If high, check for short to power in wiring.
- 55. Replace the oil pressure sensor if wiring and oil level are normal and readings do not change when disconnected.
Common causes
- Faulty oil pressure sensor
- Blocked oil passage
- Wiring issues or bad connectors
- Incorrect oil viscosity
- Oil pump malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with SPN 5355 active?
It's not recommended; high oil pressure can lead to engine damage.
Will this code come back after I fix it?
If all causes are addressed, the code should clear and not return.
Why does this code sometimes pair with SPN 1005?
SPN 1005 indicates a low-pressure situation; issues with the oil system can trigger both high and low pressure codes.
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