This manufacturer-specific trouble code indicates a malfunction within the cylinder deactivation system for engine bank 2. The system is designed to disable specific cylinders during light load conditions to improve fuel efficiency. When this code sets, the engine control module has detected that the system is not performing as commanded.
The deactivation system relies on specific oil pressure to operate lifters; low or thick oil prevents proper engagement.
Electrical or mechanical failure within the solenoid prevents oil from reaching the deactivation lifters.
Accumulated carbon or sludge restricts oil flow required to actuate the cylinder deactivation mechanism.
Corrosion or broken wires interrupt the signal or power supply needed to operate the control solenoids.
Internal components within the lifter may wear out or break, preventing physical cylinder deactivation.
While rare, the computer may fail to send proper commands or misinterpret sensor data regarding system status.
It is generally safe to drive temporarily, but prolonged operation with low oil pressure or mechanical binding can cause engine damage.
No, PCM failure is extremely rare for this code; focus on oil pressure, solenoids, and wiring first.
If the cause is low oil level or degraded viscosity, yes, but mechanical failures will require component replacement.
Some owners choose to disable the system, but this requires specific modifications and may affect emissions compliance.