Engine Oil Pressure Low
Indicates the engine oil pressure is below the acceptable range.
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 oil pressure is too low, which means the oil isn't circulating properly to lubricate the engine components, risking engine damage.
What the computer is actually seeing
The engine control module (ECM) monitors the oil pressure via a sensor. When pressure drops below a certain threshold (typically below 5 PSI or 35 kPa), it triggers this code.
What a healthy reading looks like
Oil pressure should typically be between 10-30 PSI (70-200 kPa) at idle and 25-55 PSI (170-380 kPa) 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; top off if low. If low, check for leaks.
- 22. Inspect wiring and connector at the oil pressure sensor for damage or corrosion. Repair if necessary.
- 33. Start the engine, and use a manual oil pressure gauge to check actual oil pressure reading. Compare to expected values.
- 44. If the gauge shows low pressure, check the oil pump operation and condition. If it's functioning, further inspect for internal engine wear or blockage.
Common causes
- Low oil level
- Oil pump failure
- Faulty oil pressure sensor
- Blocked oil passages
- Worn engine bearings
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, low oil pressure can cause severe engine damage. Get it checked immediately.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes; it will likely return.
Why does this code sometimes pair with SPN 3146?
SPN 3146 indicates a high engine oil temperature, which can affect pressure readings.
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