Engine judders in idle

[Vanessa Weedon-Jones]

Hi, we’ve just fitted a new battery to our 2005 2.4 hybrid. Now the engine is juddering when in drive but idling eg waiting at traffic lights. It seems worse when the air con is on. Any ideas what might be causing this?

[Picasso]

Hello Vanessa may I ask where you got the battery from also do you mean the 12volt battery or the main hybrid battery are there any lights on the dash staying on could you also pm me your reg no. 

[Jeza]

If the 12v battery, most likely the engine ECU relearning the idle settings after battery disconnection. Also you will find the drivers door window controls for the other doors won't work, you need to lower and raise each window by its own door switch first.