Engine Oil Pressure Sensor Circuit High
This code indicates that the engine oil pressure sensor is reporting a high voltage signal.
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 is supposed to send a signal when the oil pressure drops but it’s sending a high voltage signal instead, which can happen if there's a short circuit or a bad sensor.
What the computer is actually seeing
The engine control module (ECM) sees a signal from the oil pressure sensor greater than 4.5 volts, indicating that either the pressure is too high or there’s an issue with the wiring or sensor.
What a healthy reading looks like
Normal oil pressure readings should be between 0.5 volts (low pressure) and 4.5 volts (high pressure) with 0 volts at no oil pressure, ideally around 1-2 volts at idle.
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 normal range. Decision point: Is the oil level low? If yes, top off and test again. If no, proceed to next step.
- 22. Inspect the wiring and connectors between the oil pressure sensor and the ECM; look for frays, shorts, or corrosion. Decision point: Are the connectors clean and secure? If no, clean or repair them and test. If yes, proceed to next step.
- 33. Use a multimeter to test the voltage at the oil pressure sensor connector with the engine running. Decision point: Is the voltage over 4.5 volts? If yes, suspect a faulty oil pressure sensor. If no, check for shorts to power and inspect the ECM. If no shorts are found, replace the oil pressure sensor.
Common causes
- Faulty oil pressure sensor
- Shorted wiring in the oil pressure circuit
- Oil pump failure or obstruction in oil passage
- Poor electrical connections at the sensor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, this code means you could have high oil pressure or a faulty sensor, both of which can lead to severe engine damage.
Will the code come back after I fix it?
If the issue is resolved and all wiring is intact, the code should clear and not return.
Why does this code pair with SPN 1658?
SPN 1658 relates to the oil pressure sensor circuit low, indicating both high and low voltage issues can stem from wiring or sensor problems.
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