Certain buses were built with daytime running lamps (DRLs) that don't turn off when the fog lights are switched on. Canadian regulations require the DRLs to turn off when the front fog lamps are switched on.
Safety Risk
Daytime running lamps that stay on in foggy conditions could cause glare and reduced visibility. This could increase the risk of a crash.
Corrective Actions
Prevost will notify owners by mail and advise you to take your bus to a Prevost service center to update the daytime running lamp software.