Help

[Philipopo]

Does anyone knows the cause of this 2 fault marked here please. This is for Citroen C4 B7 with automated manual gearbox. I had replaced the engine, but has refused to start up.

[GiveMeABreak]

The gearbox ECUs on these vehicles can also be paired to the engine ECU. If you have changed to a different engine ECU or the engine is not identical, then it can stop the car from starting as you can see from the diagnostic information - the engine ECU is not authorising the starting of the vehicle as it's getting the request from the gearbox ECU, but not the authorisation.

[xantia_v6]

I would expect that live data in the gearbox ECU will give the cause for it not authorising the engine start.

[Philipopo]

Thanks for the response, am having a whole new issues with the gearbox and i cant post a new topic here

[myglaren]

Thanks for the response, am having a whole new issues with the gearbox and i cant post a new topic here

Go to the index page for the Citroen subforum and the New Topic button is on the far left under the Citroen title.

[Philipopo]

thank you