Exhaust Camshaft Position Actuator Circuit / Open (Bank 2)
The exhaust camshaft on the right side of the engine isn't responding to the computer's commands, like a remote control with a broken connection to the TV. The ECU detected an open or broken circuit in the wiring or actuator that controls this camshaft's timing.
The ECM sends voltage signals to the exhaust camshaft actuator solenoid on Bank 2 and monitors feedback current flow. If the circuit is open or resistance is too high, the ECU detects insufficient current draw within expected time windows. The system expects smooth electrical continuity and proper solenoid response.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Current Draw | 0.5–2.0 amps during actuation | Below 0.1 amps or no response |
| Circuit Resistance | 4–8 ohms | Above 15 ohms or open circuit |
Code P0023 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0023 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.