The P0023 fault code, applicable to all car manufacturers, means “B Camshaft Position – Actuator Circuit/Open (Bank 2)“.
Background Information: The camshaft controls the opening and closing of the valves. In a variable valve timing system, the electronic camshaft adjusting valve (or oil control valve, OCV) adjusts the camshaft angle by changing the oil pressure to the camshaft adjuster (mechanical) according to instructions from the engine control module (ECM), ensuring the valves open and close at the optimal time. Possible causes of P0023 include the exhaust/right/rear camshaft adjusting valve (oil control valve), its circuitry, connectors, excessively dirty oil, or the ECU. “B” camshaft must refer to the “exhaust,” “right,” or “rear” camshaft. Determine left/right and front/rear from the driver’s position. The first group refers to the group including cylinder 1, and the second group is the group opposite the first.
Tip: To quickly find fault codes, you can use a professional OBD diagnostic tool. This will help you accurately locate the problem. This data can help you understand the performance of various vehicle components and troubleshoot problems before they escalate.