I have a 2005 Pontiac Vibe with engine code P2610. What do I need to do , what is this code mean ?

P2610 - ECU Malfunction : Power train Control Module (PCM) Ignition Off Internal Timer Performance Problem

ECU / PCM   refers to the engines Computer// this fault code is used by different manufacturers and refers to the engine computer as it may be called ECM/ECU/PCM etc.  Replacing the computer may be costly but should eliminate the code. Also the dealer should be able to re flash the computer currently in the car. You may find that it will be covered under warranty. Contact your local dealer and talk to the service department. Re flashing the computer should be less expensive ..