Low Pressure Oil Circuit Fault
Indicates a problem in the low pressure oil circuit.
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 seeing low oil pressure in the system, which could mean that there's not enough oil getting to critical parts, risking engine damage.
What the computer is actually seeing
The Engine Control Module (ECM) monitors low pressure oil circuit pressure. It expects signals that typically range from 5 to 40 psi based on engine RPM and conditions.
What a healthy reading looks like
During normal operation, the oil pressure should typically be between 15 psi and 45 psi, depending on engine speed and 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.
- 1Check the oil level. If low, top off with the correct type and viscosity oil.
- 2Inspect the oil pressure sensor and connector for damage or corrosion. Test the sensor at idle: it should read at least 15 psi under load.
- 3If the sensor checks out, connect a mechanical gauge to verify actual oil pressure. If below 15 psi at operating temperature, suspect a worn oil pump or internal engine issue.
- 4Examine oil passages for obstructions or sludge, especially after an oil change.
- 5If all else looks good but the fault persists, consider testing or replacing the oil pump.
Common causes
- Low oil level
- Worn out oil pump
- Blocked oil passages
- Faulty oil pressure sensor
- Oil viscosity incorrect for operating conditions
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s not recommended to drive, as low oil pressure can cause engine damage.
Will this code come back after clearing it?
If the cause isn't fixed, the code will likely return.
Why does this code show up with other codes?
It often pairs with codes related to oil pressure, as multiple issues in the oil system can arise simultaneously.
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