My mum has a 03 plate mk4 1.6 8v AUTO LS Astra with only 15k on the clock.
We have had this problem since Sunday after 3 years of faultless driving.
The Emission light appeared on the dash board on her way home but the car drive fine. I looked at it at home after the car cooled and cleaned the cold start (front) O2 sensor connector, MAF sensor and general plugs. Started the car and the light was gone. Sorted I thought but then next day it appeared but this time the car stalled while driving (not stopping of slowing) she started fine but the light was back and it ran a little funny. Cleaned stuff again changed Air filter as was alittle clogged but its been getting worse. Now it will stall when idling but it doesn't struggle and stall it just dies in a click of a finger.
Its been to an Independent Garage who just have normal diag's and they said Crankshaft Sensor which we replaced but the problem is still there, plugged it in again and ecu still thinks it Crank sensor again!
Anyone had or heard of this problem before? We have ran out of ideas what to check and don't want to keep changing sensors.