EGR valve failures
EGR (exhaust gas recirculation) valve failures are among the most commonly reported issues on used Vauxhall Corsas and Astras with 1.3 CDTi and 1.6 CDTi diesel engines. Symptoms include rough idle, reduced power, and increased fuel consumption. A blocked EGR often triggers an emission advisory on MOT records, which a Carhealth check will surface.
