P0023 Exhaust Camshaft Position Actuator Circuit/Open Bank 2

P0023 points to an exhaust camshaft position actuator circuit or open-circuit fault on bank 2. The code centers on the actuator control circuit.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the exhaust cam actuator until the circuit is checked for opens, shorts, poor terminals, and oil contamination.

Symptoms of P0023

Check-engine light on, sometimes with rough or uneven running.
Hesitation, surging, or a noticeable change in fuel economy.
Occasionally hard starting or a smell of unburnt fuel.

Common causes of P0023

A failing or contaminated sensor (MAF, MAP, oxygen or air-fuel sensor).
Intake or vacuum leaks, or an exhaust leak near an upstream sensor.
Wiring, connector, or fuel-delivery problems that skew the reading.

Useful checks before replacing parts

Inspect bank 2 exhaust cam actuator connector fit, wiring continuity, control circuit, power feed, and terminal condition.
Check oil level and oil condition because actuator response can be affected by lubrication faults as well as circuit faults.
Compare commanded exhaust cam movement with actual cam position and review related correlation or actuator codes.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.