Question 1

AdBlue (SCR) system faults (1.6 CDTi)

Accepted Answer

The SCR emissions system on the 1.6 CDTi can develop faults in the AdBlue pump, tank heater, NOx sensors or dosing injector, often caused by crystallised fluid. The dashboard shows an emissions warning and a countdown in miles after which the engine will not restart.

Question 2

Clogged EGR valve (1.6 CDTi)

Accepted Answer

Carbon build-up in the EGR valve and inlet manifold on the 1.6 CDTi causes hesitation, rough idle, black smoke, an engine management light and limp mode. It is made worse by short journeys and long periods of idling.

Question 3

DPF blockage from short journeys (1.6 CDTi)

Accepted Answer

The diesel particulate filter on the 1.6 CDTi needs regular sustained runs at motorway speeds to regenerate. Cars used mainly for short urban trips light up the DPF warning, lose power and may go into limp mode; repeated interrupted regenerations also dilute the engine oil with diesel.

Vauxhall AstraAstra K

Known issues and common problems

Vauxhall AstraAstra K

Known issues and common problems

AdBlue (SCR) system faults (1.6 CDTi)1 solutionsHigh

Clogged EGR valve (1.6 CDTi)at 130000 km · 1 solutionsMedium

DPF blockage from short journeys (1.6 CDTi)1 solutionsMedium