P06DA — Engine Oil Pressure Control Circuit Open
Modern engines use an electrically controlled variable-displacement oil pump or a pressure regulator solenoid. The control circuit on this regulator has an open circuit - the ECU cannot vary oil pressure with load and the pump runs at default mechanical pressure.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Oil pressure regulator
- Variable displacement oil pump
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Open in solenoid or wiring
- Pin pushed back out of connector body
- Cracked solder joint inside the module or sensor
Possible symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.