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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Hybrid Engine Control System) >> Diagnostic Information and Procedures >> Engine Does Not AutoStop >> Autostop/Autostart

Engine Does Not AutoStop: Autostop/Autostart

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

The Two-Mode Hybrid vehicle does not require ICE operation at all times. After a successful engine start, the hybrid powertrain control module (HPCM) may turn off the engine, or Autostop, when not required for the current vehicle conditions. The engine will remain off while in Autostop mode, until such time that vehicle conditions require the engine to run. The near-instant starting of the engine from Autostop mode is called Autostart.

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