P06DCEngine Oil Pressure Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- A switchable or variable oil pump saves fuel by lowering its output at part load; a solenoid valve sets the stage. GM and Ford design it so the pump runs at full output, i.e. high pressure, when the valve is unpowered – the safe default – and at the low stage when powered. P06DC means the control wire is shorted to positive: the low-side driver can no longer pull it to ground, so the valve stays unpowered and the pump at high pressure – the safe state. GM checks this with the driver on and flags a short below 0.5 Ω after two trips. GM checks the low-side driver at 11 V or more relay voltage over 40 of 50 samples (100 ms); Ford's smart driver reports output faults after 5 s with the battery at 11 V or more. Apart from slightly higher consumption there are usually no symptoms. An open circuit is P06DA, a short to ground P06DB.
- What you may notice
- Check engine light after two trips
- Usually no noticeable symptom, oil pressure permanently high
- Slightly higher fuel consumption
- Likely causes
- LikelyControl wire shorted to positive
- PossibleValve coil shorted (looks like a short to positive at the driver)
- RareEngine module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.