P2664 means the powertrain control module (PCM) has sensed a higher‑than‑expected voltage on the control circuit for the rocker‑arm (variable‑valve‑timing) actuator on bank 2. The 'B' designates a specific solenoid in the VVT system, and the high signal suggests a short to power, an open ground, or a defective actuator. If left unresolved, the engine may run roughly or suffer reduced fuel economy.
An internal short in the solenoid can keep the circuit permanently high, triggering the code.
A short to battery voltage, broken wire, or corroded connector can produce a constant high signal.
If the fuse that supplies power to the actuator is open, the circuit may read abnormal voltage.
Damaged insulation, bent pins, or moisture intrusion can create intermittent high resistance.
Only after all wiring, fuses, and the actuator itself have been verified as good should the control module be replaced.
No. The PCM is rarely the cause of this code. Most failures are in the actuator solenoid, wiring, or fuses. Only after those components have been tested and ruled out should the PCM be considered.
The vehicle may still run, but you may notice poor performance, rough idle, and higher fuel consumption. It is advisable to diagnose and repair the issue promptly to avoid emissions compliance problems.
'B' refers to a specific actuator within the variable‑valve‑timing system on bank 2, distinguishing it from other actuators (such as 'A') used in the same engine.
A malfunctioning actuator mainly affects valve timing, leading to reduced efficiency and higher emissions. Prolonged operation with a failed VVT system is unlikely to cause mechanical damage but should be repaired to restore optimal performance.