Faulty oil pressure control solenoid or valve stuck in the on position; Wiring fault, such as a short to voltage or ground, or a chafed harness at the control circuit; Corroded, loose or damaged connector at the solenoid or control unit; Sludged or contaminated oil, or the wrong grade or level of oil, causing the valve or pump to stick; Faulty variable displacement oil pump or its internal control mechanism; Faulty oil pressure sensor giving feedback that disagrees with the command; Internal engine control unit driver fault or outdated software where the manufacturer lists it as a known cause.

P06DE

Engine Oil Pressure Control Circuit Stuck On.

Generic
Powertrain
Generic code
High severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
6: AreaComputer and output circuits
DE: FaultThe specific fault in that area

What it means

P06DE is the generic code for the engine oil pressure control circuit being stuck on. The engine control unit commands the variable oil pump or oil pressure control actuator and sees that it stays in the 'on' state, or that the feedback does not match the command. The exact test and what counts as 'on' depend on the make, model and engine.

Symptoms

Oil pressure warning light or low oil pressure message
Engine management light on
Noisy or rough running if oil pressure is wrong
Reduced performance or limp mode on some models
Fuel economy slightly worse than usual

Possible causes

Faulty oil pressure control solenoid or valve stuck in the on positionlikely
Wiring fault, such as a short to voltage or ground, or a chafed harness at the control circuitlikely
Corroded, loose or damaged connector at the solenoid or control unitpossible
Sludged or contaminated oil, or the wrong grade or level of oil, causing the valve or pump to stickpossible
Faulty variable displacement oil pump or its internal control mechanismpossible
Faulty oil pressure sensor giving feedback that disagrees with the commandpossible
Internal engine control unit driver fault or outdated software where the manufacturer lists it as a known causerare

How to diagnose

Read all stored and pending codes and the freeze frame data, noting engine speed, load and oil temperature when the fault set
Check the oil level and condition, and confirm the oil grade matches the manufacturer specification
Inspect the oil pressure control solenoid or valve, its wiring and its connector for damage, oil contamination, corrosion and bent pins
Check the supply, ground and control signal at the solenoid connector with a multimeter, against the manufacturer wiring diagram
Measure the solenoid resistance and compare it with the manufacturer specification
Use live data to compare the commanded and actual oil pressure, and confirm the sensor reading with a mechanical pressure gauge
Check for a technical service bulletin or software update for your model and engine
Test the actuator operation with a bidirectional scan tool function if the vehicle supports it

How to fix

Repair or replace damaged wiring and clean or replace faulty connectors
Replace the oil pressure control solenoid or valve if it is stuck or out of specification
Change the oil and filter with the correct grade, and clean or replace parts blocked by sludge
Replace the oil pressure sensor if it is proven faulty
Replace the oil pump if mechanical tests show it is not controlling pressure correctly
Update or reflash the control unit software only if the manufacturer lists it as a fix for this fault

Can I keep driving?

High severity

Limit driving until you have confirmed that oil pressure is correct, because incorrect oil pressure can damage the engine. If the oil pressure warning light is on, or the engine is noisy, stop driving and have the car recovered.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.