Not so much a new topic as a continuation of one I started last December. Then I had a starting problem where (occasionally) the engine would run rough, misfiring and not pulling; this would throw up messages all over the dash – ECM fault, Service fault, Anti pollution Alert, Cat Conv Fault. I eventually found a way of overcoming this by switching on ign for 20-30 secs before turning the engine over. This worked every time, so I lived with it temporarily, but I do like to have everything working as it should, and eventually I called the Citroen garage who do all my servicing.
They fixed it by installing 4 point plugs, new coil pack and updating engine management software.
All went well for a couple of months then one day returning from a shopping trip, downhill on overrun the Anti pollution Alert came up again.
Now this one has them stumped. They cleared the fault list and Lexia reported a faulty upstream Oxygen Sensor which they replaced and the engine started OK, ran on a road-test, but then threw up the alert every time the engine is started but with no suggestions from Lexia as to what the trouble is.
They’ve had the car for over a week now and still can’t find the cause.
The MOT was due last Friday, but of course if won’t pass until this is fixed!
Any suggestions would be gratefully accepted (and prayers!)
Garryd