Hi fellow tech
Need help with a vauxhall insignia 2010 2.0L diesel mileage 102323
came in with customer reporting vehicle going into limp mode .Scanned vehicle and it posted codes P039D,P0399,P03AD,P03B7 and P03A3 all relate to cylinder pressure erratic done a little digger and found a post saying the vehicle needed a software update booked in with the local vauxhall agent and had the update done FOC due to the recall
picked the vehicle up and after 1/4 of a mile fault returned with the same codes
vauxhall recommend replacing all glow plug at a cost of £300 + vat but i donot want to replace until I know that i have tested them and they are faulty , Has anyone seen this problem before and is there any test procedures for these pressure sensor