Advanced Diagnostics

DTC P2654 (38) Advanced Diagnostics

DTC P2654:

Rocker Arm Oil Control Solenoid B (Bank 1) Circuit High Voltage





General Description

The variable cylinder management (VCM) system switches the valve timing by opening and closing the oil groove to the cam switching mechanism. The oil groove is opened and closed by the rocker arm oil control solenoid, and the powertrain control module (PCM) controls the VCM system via the rocker arm oil control solenoid. The PCM outputs the signal and monitors the PCM output terminal voltage level. When an abnormal condition continues for a set time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status





Enable Conditions





Malfunction Threshold

The return signal is ON (high) for at least 1.0 second when the PCM outputs the OFF (low) signal to the rocker arm oil control solenoid B (bank 1).

Driving Pattern

Start the engine, and let it idle for at least 10 seconds.

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.