Damaged, chafed or broken wiring to the oil pressure control solenoid or valve; Corroded, loose or contaminated connector at the control solenoid, often from an oil leak; Failed oil pressure control solenoid or valve with an open internal coil; Blown fuse or a lost power or earth supply to the control circuit; Faulty variable displacement oil pump with its control device built in; Internal fault in the engine control module output driver.

P06DA

Engine Oil Pressure Control Circuit/Open.

Generic
Powertrain
Generic code
Medium severity

How this code is built

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

What it means

P06DA is the generic code for an open circuit fault in the engine oil pressure control circuit. The engine control module drives an oil pressure control device, usually a variable-output oil pump control solenoid or valve, and it has detected no current flow or an open circuit on that output. The exact device and circuit layout depend on the model and engine.

Symptoms

Oil pressure warning light or a message on the dashboard
Engine management light on
Reduced engine power or limp mode on some models
Oil pressure that seems too high or too low on the gauge or in live data
Increased engine noise, such as ticking or rattling, if oil pressure is not controlled correctly
Related fault codes for oil pressure or variable valve timing stored alongside it

Possible causes

Damaged, chafed or broken wiring to the oil pressure control solenoid or valvelikely
Corroded, loose or contaminated connector at the control solenoid, often from an oil leaklikely
Failed oil pressure control solenoid or valve with an open internal coillikely
Blown fuse or a lost power or earth supply to the control circuitpossible
Faulty variable displacement oil pump with its control device built inpossible
Internal fault in the engine control module output driverrare

How to diagnose

Read all stored and pending codes and note the freeze frame data, then check for related oil pressure or valve timing codes.
Check the engine oil level and condition, as low or contaminated oil can cause related faults and must be put right first.
Visually inspect the wiring and connector at the oil pressure control device for chafing, heat damage, oil contamination and poor pin tension.
Check the relevant fuses and the power and earth supplies to the circuit against the manufacturer wiring diagram.
Measure the resistance of the control solenoid coil and compare it with the manufacturer specification.
Test the wiring between the solenoid and the control module for continuity, and for short circuits to earth or voltage.
Using a scan tool with bidirectional control, command the device and watch for a response in live oil pressure data, where the model supports it.
Check the actual oil pressure with a mechanical gauge if the live data and commanded values do not agree.

How to fix

Repair or replace the damaged wiring, and secure it clear of heat and moving parts.
Clean, repair or replace the corroded or oil-soaked connector and its terminals.
Replace the faulty oil pressure control solenoid or valve and fix any oil leak that contaminated it.
Replace the blown fuse after finding and correcting the reason it failed.
Replace the oil pump or its control assembly if the control device is not serviceable separately.
Repair or replace the engine control module only after wiring and components have been proven good.

Can I keep driving?

Medium severity

Short, gentle journeys are usually possible, but get it checked soon because incorrect oil pressure can damage the engine. If the oil pressure warning light is on, or there are new engine noises, stop driving and have the car recovered.

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