Diesel cars can be particularly affected. Diesel engines and emissions systems, including the Diesel Particulate Filter (DPF), rely on sustained higher temperatures to operate correctly. Short journeys in winter may never allow these systems to complete their regeneration cycles.

Over time, this can lead to soot build-up, warning lights, and reduced performance. Petrol cars are not immune, but diesel vehicles used mainly for short trips in winter are at higher risk of emissions-related problems.