What it means
The engine oil pressure control circuit voltage is above the expected range. The exact component and resulting oil-pressure behavior depend on the vehicle.
At a glance
- Usually lights the check-engine light
How it works
The engine oil-pressure control circuit carries the module's command to an oil-pressure regulating component, whose design depends on the engine. P06DC sets when the module detects voltage above the circuit's expected range, often indicating a control wire contacting a power source; it does not reveal actual oil pressure.
Common causes
Most likely first.
- Control line shorted to supply
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
How to diagnose it
- Record freeze-frame data and related codes, then check for an oil-pressure warning or unusual engine noise before operating the engine.
- Use service information to locate the oil-pressure control component and inspect its harness for pinching or insulation damage where it could touch a supply wire.
- Check the connector for corrosion, loose pins, or heat damage that could interfere with the control signal.
- Measure the circuit at the component and module connectors under the manufacturer's specified conditions and compare the result with the manufacturer's specification.
- If the voltage remains high, isolate the harness and component using the vehicle's procedure to distinguish a short to supply from a failed control component or module output.
Common fixes
- Repair a pinched or damaged control wire that is shorted to a power feed.
- Clean or repair loose or corroded terminals at the oil-pressure control connector.
- Repair the confirmed wiring short or replace the control component if it fails the specified test.
- Clear the code after repair and verify circuit operation; perform a relearn if the vehicle requires one.
Can I keep driving?
If an oil-pressure warning appears or the engine becomes noisy, stop the engine and do not drive until actual pressure is checked; high circuit voltage does not confirm safe oil pressure. If there is no warning and the engine sounds normal, limit driving and arrange prompt diagnosis.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.