Powertrain, generic · Computer and auxiliary outputs

P06DA Engine Oil Pressure Control Circuit/Open

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modeNo

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. P06DA means the control circuit of this valve is open: it can no longer be powered, so the pump stays at high pressure. GM measures the voltage with the driver off and flags more than 200 kΩ after two trips; some GM modules set P06DB instead. 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. Mitsubishi's 2022 Outlander uses the same code. The engine is not at risk, the pump just can no longer be regulated.

Likely causes

Connector at the control valve loose or corroded (often at the pump in the oil pan)
Valve coil open or valve broken
Supply (main relay) or control wire broken
Engine module software

Symptoms

  • Check engine light after two trips
  • Usually no noticeable symptom, oil pressure permanently high
  • Slightly higher fuel consumption

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–450
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

oil pump control valveoil pump control circuitengine control module

Related codes

P06DBP06DCP06DDP06DEP0521

References: gsi.ext.gm.com, fordservicecontent.com, static.nhtsa.gov, static.nhtsa.gov.