Oil Pressure Sensor Circuit Low Voltage
The engine control module has detected low voltage from the oil pressure sensor.
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 oil pressure sensor is sending a voltage signal below the expected level, indicating a potential oil pressure issue or sensor failure.
What the computer is actually seeing
The computer expects the oil pressure sensor to output between 0.5V to 4.5V depending on the actual oil pressure. When it sees a voltage less than 0.5V, it sets the SPN 6112 code.
What a healthy reading looks like
Oil pressure sensor output should be between 0.5V (no oil pressure) and 4.5V (maximum oil pressure, typically around 40-80 PSI).
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 oil level; ensure it's within the operating range. Decision: If low, refill and retest. If oil level is good, proceed to step 2.
- 22. Inspect the wiring and connector going to the oil pressure sensor for damage or corrosion. Decision: If damaged, repair or replace the wiring; if good, move to step 3.
- 33. Use a multimeter to measure the voltage at the oil pressure sensor connector with the engine running. Decision: If voltage is below 0.5V, replace the oil pressure sensor; if above 0.5V, check the ECM wiring. Proceed to step 4.
- 44. Test the continuity and resistance of the wires from the oil pressure sensor to the ECM. Decision: If continuity is poor or resistance is high, repair the wiring; if continuity is good, replace the ECM.
Common causes
- Faulty oil pressure sensor
- Wiring issue (short or open circuit)
- Low oil level or poor oil quality
- Bad connection at the sensor or ECM
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It is moderately safe to drive for a short distance, but monitor oil pressure closely to avoid engine damage.
Will this code come back after replacing the sensor?
If underlying issues like wiring faults or low oil levels aren’t fixed, yes, it can return.
Does this code relate to engine performance issues?
Yes, low oil pressure can affect engine lubrication and performance, leading to potential overheating or damage.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →