00550. Injection Start Control

[zorgman]

hi all and a happy xmas.

got my car back on xmas eve (sharan 1.9tdi 110 afn) and its all running now but using vag com this error code keeps coming up, soon as i clear it it comes back instantly.

00550. Injection Start Control

im at a loss what it is and how to cure it so any thoughts tips on what it is please

[stevie m]

You mean, 00550 Injection commencement regulation. There are a number of possible reasons for this;1) Commencement of injection valve (N108) defective, this is inside the distributor pump.2) Needle lift sender (G80) defective, number 3 injectior.3) Fuel tank empty.4) Fuel supply not OK., fuel shortage.5) Air in fuel system.6) Start of delivery not OK, COI setting.The first thing to do is to set the Commencement Of Injection (COI) timing. To do this you need to get the engine temperature above 85