P0023

Universal

Exhaust Camshaft Position Actuator Circuit / Open (Bank 2)

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Medium Severity

The engine computer has detected an open or interrupted electrical circuit in the exhaust camshaft position actuator system for Bank 2. This actuator helps control exhaust cam timing. The code identifies a circuit condition; it does not by itself prove that the actuator needs replacement or confirm a specific timing problem.

Report an error with this code

⚠️ Before You Begin (Safety First)

If the engine runs smoothly, there may be no immediate driving symptom, but arrange diagnosis soon. Stop driving and seek assistance if the engine stalls, loses substantial power, makes unusual mechanical noise, or displays an oil-pressure warning.

Common Symptoms

  • The check-engine light may be on because the engine computer detected an electrical circuit fault.
  • There may be no noticeable symptoms if the engine continues to operate normally.
  • A disrupted exhaust cam timing adjustment may contribute to rough running, reduced power, or hesitation, depending on the vehicle and how its system responds.
  • In some cases, starting or idling may be affected if the actuator system cannot control cam timing as expected.

Common Causes

  • A damaged, disconnected, or corroded connector or wire may interrupt the actuator circuit.
  • An open circuit in the actuator's power, ground, or control wiring may trigger the code.
  • The exhaust camshaft position actuator may have an internal electrical fault.
  • A fuse, relay, or shared electrical supply issue may interrupt power to the circuit, if used by the vehicle's design.
  • A control-module circuit fault is possible, but should be considered only after the wiring and actuator are tested.

Diagnostic Steps

  1. Record the code and any other stored codes before clearing anything; related codes can help identify whether the issue affects a shared circuit.
  2. With the engine off and cool, visually inspect accessible wiring and the connector for the Bank 2 exhaust camshaft position actuator. Look for loose connections, damaged insulation, or corrosion, and avoid pulling on wires.
  3. Check the vehicle's owner information for the correct engine-oil level and required oil type. This does not establish or repair an open electrical circuit, but correct oil matters to many cam-timing systems.
  4. If the connector or wiring looks damaged, or if the fault returns, have the circuit tested with vehicle-specific wiring information. Avoid replacing parts based on the code alone.

When to Call a Professional

A technician can use vehicle-specific service information and scan data to check the actuator command and related readings, then inspect the Bank 2 circuit. Testing may include checking the connector, wiring continuity, power and control circuits, and the actuator using the vehicle maker's specifications. The control module should be considered only after the circuit and actuator have been checked.

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Commonly Asked Questions

Does P0023 prove the exhaust camshaft actuator is faulty?

No. The code indicates an open or interrupted actuator circuit on Bank 2. Wiring, connectors, power supply, or the actuator itself may be involved, so testing is needed before replacing a part.

Does this code mean the camshaft timing is definitely wrong?

Not necessarily. The code describes an electrical circuit condition. A circuit fault can interfere with cam-timing control, but the code alone does not confirm the actual cam timing or identify the failed component.

Can I drive with P0023?

If the vehicle runs normally, a short trip to arrange diagnosis may be reasonable. Stop driving if it stalls, loses substantial power, makes unusual mechanical noise, or shows an oil-pressure warning.

What does Bank 2 refer to?

Bank 2 identifies one side of the engine, but its physical location depends on the engine design. Use vehicle-specific service information to identify it correctly.

Related Diagnostic Video

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