Open circuit or high resistance in the actuator wiring on Bank 2, such as a chafed, broken or corroded wire; Corroded, loose or contaminated actuator connector; Faulty camshaft profile actuator or solenoid on Bank 2 with an open internal coil; Low battery or system voltage, or a poor power or earth supply to the actuator circuit; Oil leaking into the connector or wiring loom, damaging the insulation or terminals; Fault in the engine control unit driver circuit; Outdated control unit software where the manufacturer has published a fix for this code on the specific engine.

P001D

A Camshaft Profile Actuator A Control Circuit/Open Bank 2.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
1D: FaultThe specific fault in that area

What it means

P001D means the engine control unit has found a fault in the control circuit of the 'A' camshaft profile actuator on Bank 2, usually an open circuit. The control unit drives this actuator to change the cam profile, which may mean valve lift or cam lobe switching. It sets the code when the commanded state and the electrical feedback from the circuit do not agree. The exact actuator type and the location of Bank 2 depend on the engine.

Symptoms

Engine warning light on
Reduced power or flat spot at higher revs
Rough idle or hesitation
Poorer fuel economy
Engine may enter limp mode with limited revs
Other camshaft timing or valve lift codes stored alongside

Possible causes

Open circuit or high resistance in the actuator wiring on Bank 2, such as a chafed, broken or corroded wirelikely
Corroded, loose or contaminated actuator connectorlikely
Faulty camshaft profile actuator or solenoid on Bank 2 with an open internal coillikely
Low battery or system voltage, or a poor power or earth supply to the actuator circuitpossible
Oil leaking into the connector or wiring loom, damaging the insulation or terminalspossible
Fault in the engine control unit driver circuitrare
Outdated control unit software where the manufacturer has published a fix for this code on the specific enginerare

How to diagnose

Read all stored codes and freeze frame data to see engine speed, load, temperature and voltage when the fault set, and note any related cam timing codes
Check the battery condition and charging voltage, as low voltage can cause circuit faults
Inspect the Bank 2 actuator connector and wiring for damage, chafing, corrosion, oil contamination or pushed-back pins
Check the engine oil level and condition, as the actuator is oil-operated on many engines
With the ignition off and the connector unplugged, measure the actuator coil resistance and compare it with the manufacturer's specification for that engine
Check the power, control and earth wires between the actuator and control unit for continuity and for shorts to earth or voltage
Use a bidirectional scan function, if available, to command the actuator and check for a response and a clean control signal
Check for applicable technical bulletins or software updates for that engine before replacing the control unit

How to fix

Repair or replace damaged wiring, and correct any terminal or pin fault in the actuator connector
Clean or replace a corroded or oil-soaked connector, and fix the source of the oil leak
Replace the Bank 2 camshaft profile actuator or solenoid if its coil is open or out of specification
Repair the battery, charging or earth fault if system voltage is the cause
Update the control unit software only if the manufacturer lists it as a fix for this code and engine
Replace or repair the control unit only after the wiring and actuator have been proven good

Can I keep driving?

Medium severity

Short, gentle trips are usually possible, but power may be reduced and the car may be in limp mode. Get it checked soon, because a lasting fault can affect running and may be accompanied by other valve control problems.

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