Hi i have a vivaro 06 1.9 I have an engine man light that is doing my head in. The problem I have is when I go over 60 the man light comes on. I got a local garage to plug there TEC 2 in and they told me it was a MAS flow air sensor code and a high boost pressure so I brought a genuine vauxhall MAS flow and a boost pressure switch cleared codes and the light still comes on. I then swapped the EGR value with a vivaro with no light coming on but still light comes on. It is better but still comes on over 70 and when engine is under pressure up hills. The garage i use have drawn a blank said it could be turbo but as the van is running ok and turbo is working around town they don’t think this is the problem has anyone got any info that could help me the codes are po100 (B) mass air flow high input.
P1125 (1) boost pressure solenoid valve excessive flow detected
Help please

scott, June 2011

try checking intercooler hose right down back of engine i had exactly the same problem low power and limp home mode when glow plug light came on. ichanged maf sensor, boost sensor and boost solenoid before finding split pipe by accident, my 2.5 trafic has been down on power for 12 months, now i know why

salop neil, August 2011

how can i check if it is seized as it pulls really well but soon as you give the van a foot full on the motorway the engine man light comes on i will change the wastegate if you think i could be this

scott, June 2011

sometimes hard to get to the bottom of these but did the garage have a look at the turbo wastegate to check if it was seized

cdc, June 2011