Q: How to disconnect and replace the tandem fuel pump while ensuring the engine management ECU's fault code is addressed on 2015 Audi A3?
A: Removal of the central connector of the unit injectors can record a fault code in the engine management ECU, that can only be cleared by an Audi dealer or specialist. On the cylinder head is the tandem fuel pump which is a vacuum and fuel lift pump. Take removal and refitting procedures through, taking care to engage and prime.