The P0025 fault code, applicable to all car manufacturers, means “B Camshaft Position – Timing Over-Retarded (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. Causes of the P0025 fault include incorrect timing of the B exhaust/right/rear camshaft, or a mechanically stuck camshaft delay mechanism. In short, it’s timing too late. The “B” camshaft must be the “exhaust,” “right,” or “rear” camshaft. Determine left/right and front/rear from the driver’s position looking forward. 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 car scanner. 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.