Engine Oil Pressure Sensor Signal Fault
The engine control unit detected an issue with the oil pressure sensor signal.
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What it means (plain English)
Your truck's computer isn't getting a proper reading from the oil pressure sensor, which could mean low oil pressure or a faulty sensor.
What the computer is actually seeing
The engine control module (ECM) expects to see a voltage range from the oil pressure sensor between 0.5V (low oil pressure) and 4.5V (high oil pressure). When it sees a voltage below 0.1V or above 4.9V for more than one second, it triggers the fault code.
What a healthy reading looks like
Oil pressure should be within 10-80 psi while the engine is running, with a voltage output from the sensor correlating to this pressure range.
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. Ensure it's within the normal range. If low, top it off and see if the code clears after a reset. Decision: If oil level was low, but now normal, monitor for code recurrence. If not low, proceed to step 2.
- 22. Inspect the wiring and connector of the oil pressure sensor for any signs of damage or corrosion. Decision: If wiring is damaged, repair/replace. If intact, move to step 3.
- 33. Test the oil pressure sensor using a multimeter. With the key on (engine off), measure the voltage while the connector is unplugged. It should show around 0.5V. Decision: If voltage is out of spec, replace the sensor. If within range, move to step 4.
- 44. Start the engine and measure oil pressure using an external gauge. Compare the readings to the sensor voltage output (expecting correlation). Decision: If oil pressure is low while sensor shows high, the oil pump may be bad. If readings are normal, replace the sensor.
Common causes
- Faulty oil pressure sensor
- Wiring issues to the sensor
- Low engine oil level
- Faulty engine oil pump
- Oil passages blocked or contaminated
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity. You can drive but should fix it soon to avoid engine damage.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it likely will.
Why does this error show up with low oil pressure?
Low oil pressure triggers a fault because it can indicate a serious engine problem, which needs immediate attention.
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