vectra 2004 1.9 tdi sri 150bhp - car starts then it wont - jasoncow

help my vectra starts somtimes then somtimes it wont ive had the ecu tested no fault found.When i turn the key theirs just nothing their. when the engine managment lights comes on then it will start or try to start iv had computers on it and get fault code P1105 barometric sensor but dont know if this fault would stop the car turning over

vectra 2004 1.9 tdi sri 150bhp - car starts then it wont - hardway

Doesn't sound ecu related,sounds more like voltage supply,ie battery terminals,earths..etc.if your not getting any dash lights it's not powering up.recut the battery posts,the tools not expensive,same with the clamps,take off all engine/gearbox earths and scrape the until shiney,then I'd move on to look at the ignition switch.