Method for commissioning an internal combustion engine, and motor vehicle comprising an internal combustion engine

A method for starting an internal combustion engine comprising an attached exhaust gas system having an electrically heatable lambda sensor and a catalytic converter with an oxygen storage component, and comprising a control unit, said method encompassing the following steps:

• in response to the control unit having received a first control signal, electrically heating the lambda sensor while the internal combustion engine is still switched off,
• once an operating temperature of the lambda sensor has been reached, starting the internal combustion engine, and initiating a lambda-regulated lean operation of the internal combustion engine,
• initiating a lambda-regulated stoichiometric operation of the internal combustion engine once a first operating temperature of the catalytic converter has been reached, and
• initiating a lambda-regulated stoichiometric operation of the internal combustion engine with a varying target lambda value once a second operating temperature of the catalytic converter has been reached.