P2654 indicates that the Powertrain Control Module (PCM) has detected a higher-than-expected voltage on the control circuit for the "B" rocker‑arm actuator on Bank 1 (the cylinder‑1 side of the engine). This is typically an electrical fault involving the actuator solenoid, wiring, or connectors rather than a mechanical failure of the valve timing system.
The solenoid inside the actuator can short internally or open, causing the circuit to read high voltage.
Chafed wires, broken insulation, corroded pins, or loose connectors can create an open circuit that pulls the signal high.
A missing or blown fuse in the actuator supply circuit will prevent proper grounding, resulting in a high‑voltage reading.
Inadequate ground for the actuator can keep the control circuit from pulling low, leading to a high signal.
Low oil pressure or a clogged oil passage can prevent the actuator from functioning correctly, which may appear as an electrical fault to the PCM.
The PCM itself can misread the circuit, but this is the least common cause and should be ruled out after checking all other components.
Almost never. The PCM is rarely at fault; the problem is usually the actuator solenoid, wiring, or a blown fuse. PCM replacement should only be considered after all other electrical components have been verified.
You can drive short distances, but the engine may run roughly, lose power, and fuel economy may suffer. It’s advisable to diagnose and repair the issue promptly to avoid potential emissions or performance concerns.
Bank 1 refers to the engine bank that contains cylinder 1. In most V‑type engines, Bank 1 is the side where cylinder 1 is located; the code applies only to the rocker‑arm actuator on that side.
The code itself indicates an electrical fault rather than a mechanical failure, so immediate engine damage is unlikely. However, prolonged operation with incorrect valve timing can lead to reduced performance and higher emissions over time.