Engine Oil Pressure Low
Indicates the engine oil pressure is below the normal operating 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 computer is reading low oil pressure, which means there's not enough oil getting to the engine parts that need it to stay lubricated and cool.
What the computer is actually seeing
The engine control module (ECM) monitors the oil pressure sensor, expecting a voltage output between 0.5 volts (low pressure) and 4.5 volts (high pressure).
What a healthy reading looks like
Normal oil pressure should generally be between 30 to 70 psi when the engine is at operating temperature.
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. If it’s low, top it off to the recommended level.
- 22. Inspect for oil leaks around the engine and oil filter. Repair any leaks found.
- 33. Use a manual oil pressure gauge to check the actual oil pressure. It should read between 30-70 psi.
- 44. If pressure is low, replace the oil filter and change the oil if it hasn't been done recently; then retest.
- 55. If pressure is still low, suspect a faulty oil pressure sensor and replace it. Recheck after.
- 66. If the problem persists, consider internal engine wear or damage.
Common causes
- Low engine oil level
- Faulty oil pressure sensor
- Oil leaks
- Clogged oil filter
- 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; don't drive it until fixed.
Will this code come back after clearing it?
If the underlying issue isn't fixed, it will return.
Why did this code pair with SPN 2174?
SPN 2174 indicates a similar oil pressure issue, often related to the same underlying causes.
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