I have an 05 reg 1.6 TDCI. When the engine is at idle or low revs it makes a whining noise from the engine. It sounds like it is coming from the main engine area. When I took it for a service at Fortnams the mechanic said there was a crack in the plastic pipe conecting to the turbo which was making the noise, however when I removed the pipe and examined it, there was no crack at all. Perhaps by coinsidence I became aware of it when the battery warning light started coming on. The battery is charging and the light stopped warning me after 2 or 3 days and seems fine now.
Does anyone know what the whining noise could be?