Ok so my fault code reader turned up and I went out to have a play. It was getting a bit dark so will have another look today but I couldn't find where to plug the thing in 
The manual says on the inner wing near the battery or expansion tank or near the ECU. Can't say I spotted it in any of these places.
The only green 2 hole connector was slap bang in the middle of the engine bay at the front of the engine. Surely that isn't it?
Any ideas would be good thanks. Its a 1.4 306 TU3JP engine. Thanks.

The manual says on the inner wing near the battery or expansion tank or near the ECU. Can't say I spotted it in any of these places.
The only green 2 hole connector was slap bang in the middle of the engine bay at the front of the engine. Surely that isn't it?
Any ideas would be good thanks. Its a 1.4 306 TU3JP engine. Thanks.