The complete details of all recalls are … VTEC solenoid cleaned and seals replaced. VTEC oil pressure switch changed. Recall List for the 2007 Honda Odyssey. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. P2646 Honda Description The Variable Valve Timing and Lift Electronic Control (VTEC) system activates the Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) by command from the Engine Control Module (ECM) / Powertrain Control Module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that switches valve timing between Low and High. Official recalls have been issued for the 2007 Honda Odyssey by the NHTSA. P2646 Honda -Odyssey 2007 Engine Light comes on and van conks out at idle when engine is warmed up. Having repeated Check Engine light with P2646 code and occasionally the VSA trips as well but the VSA resets itself. P2646 HONDA Meaning The Variable Valve Timing and Lift Electronic Control (VTEC) system activates the Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) by command from the Engine Control Module (ECM) / Powertrain Control Module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that switches valve timing between Low and High. P2646 is a diagnostic trouble code (DTC) for "'A' Rocker Arm Actuator System Performance / Stuck Off Bank 1".