Oil Pressure Sensor Circuit Fault

The oil pressure sensor is not sending the correct signals to the engine control module, possibly due to a bad sensor or wiring issue.

The ECM expects a voltage signal from the oil pressure sensor between 0.5V (0 psi) and 4.5V (over 100 psi). If it sees a consistent low voltage below 0.2V or a high voltage above 4.8V, it sets this code.

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.

1. 11. Check the oil level; ensure it is within the manufacturer's recommended range.
2. 22. Inspect the wiring and connections to the oil pressure sensor for breaks, shorts, or corrosion. If faulty, repair or replace as necessary.
3. 33. With the engine running, use a multimeter to check the voltage at the oil pressure sensor connector. Expect between 0.5V and 4.5V. If voltage is below 0.2V or above 4.8V, the sensor is likely faulty.
4. 44. If the sensor voltage is not in range, replace the oil pressure sensor and retest.
5. 55. If the new sensor still shows incorrect readings, further inspect the engine oil pump.

• Faulty oil pressure sensor
• Wiring issues, such as short or open circuits
• Poor connections or corroded terminals
• Low oil level affecting pressure readings
• Oil pump failure causing low pressure

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