Engine Oil Pressure Sensor
This code indicates a fault detected in the engine oil pressure sensor or 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 oil pressure sensor monitors how much pressure the oil is applying throughout the engine. If it fails or there's a wiring issue, it can trigger this fault code.
What the computer is actually seeing
The Engine Control Module (ECM) expects to see a voltage from the oil pressure sensor that varies based on the oil pressure — typically between 0.5V (low pressure) and 4.5V (high pressure).
What a healthy reading looks like
Normal oil pressure should range between 20-70 PSI depending on engine specs; voltage from the sensor should be within 0.5V (idle) to 4.5V (full pressure).
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 the oil is low, correct this and recheck for the code.
- 22. Inspect the oil pressure sensor's electrical connector for looseness, corrosion, or damage. Repair if necessary and retest.
- 33. Measure the voltage at the oil pressure sensor while the engine is running. If it is not within 0.5V to 4.5V, the sensor is likely faulty. Swap the sensor to test.
- 44. If the sensor voltage is good, check the wiring from the sensor back to the ECM for shorts or open circuits.
- 55. If all previous checks are good, check the engine oil pump operation; low oil pressure due to a failing pump can cause this code.
Common causes
- Faulty oil pressure sensor
- Wiring issues (broken, shorted, corroded)
- Low oil levels
- Faulty engine oil pump
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You may be safe to drive, but low oil pressure can cause engine damage, so address it soon.
Will this code come back after resetting?
If the underlying issue remains (bad sensor, wiring, or low oil pressure), yes, it will come back.
Why does this code pair with SPN 104?
SPN 104 relates to engine speed and often pairs with SPN 215 when oil pressure is influenced by engine load and RPM.
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