P06DD code meaning
Engine Oil Pressure Control Circuit Performance/Stuck Off
Powertrain system Generic code P06xx codes Check engine light
What P06DD means
A switchable oil pump changes its output via a solenoid valve; unpowered it delivers high pressure. To test it, the module switches the pump between stages (GM up to 15 times, with oil at 50–110 °C and 1350–2500 rpm, expecting more than 100 kPa difference) and watches the oil pressure sensor; Ford checks each switch-over of a two-stage pump within 1 s, or a variable pump over 10 s, from 30 s after start. P06DD means the pressure does not react and stays above the threshold – the pump acts as if the valve were stuck off, at high pressure; GM sets it after two trips. Yet GM bulletins for V8 and 2.5 L engines list P06DD with low oil pressure, too: broken valve tips, unseated valves, a loose pump drive gear or worn tensioners also stop the pressure from changing. Check oil level and pressure before replacing parts.
P06DD at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor1 to 12 hours
- Clears after repairAfter a drive cycle
Symptoms of P06DD
- Check engine light after two trips
- Oil pressure stays high – or, with pump damage, low or fluctuating
- Possibly oil pressure warning
- Slightly higher fuel consumption
Common causes of P06DD
- Most likelyControl valve stuck or broken, screen clogged
- PossibleOil level too low, wrong viscosity or sludge
- PossibleMechanical pump or drive damage (tensioner, drive gear, pump face)
- Less likelyValve not seated correctly (retaining clip)
- Less likelyOil pressure sensor inaccurate
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Oil pump control valveOil pumpOil pressure sensorEngine control module
What each part of P06DD means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6 | Area: computer (engine control module) and output circuits. |
| DD | The exact fault in that area. |
What to do next
- Note P06DD and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P06DD
What does P06DD mean?
P06DD means "Engine Oil Pressure Control Circuit Performance/Stuck Off". A switchable oil pump changes its output via a solenoid valve; unpowered it delivers high pressure. It is a generic code, so it means the same on every make.
Is it safe to drive with P06DD?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P06DD fail an emissions test?
P06DD is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P06DD to fix?
Difficulty: hard. A typical repair takes 1 to 12 hours of work. This is a job for a workshop.
Will P06DD clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.