How do you reset lombard sensor on a vectra?

To reset the Lombard sensor on a Vectra, first, ensure the vehicle is in a safe position and turn off the ignition. Then, turn the ignition key to the "On" position without starting the engine. Press the gas pedal fully three times within five seconds. Finally, turn off the ignition again and start the engine to complete the reset process. If the sensor still shows issues, further diagnostics may be necessary.