Having some problems with my A4 1.9 tdi, 1999, 189k.
When I try to start the car the Glow Plug Light only comes on the odd time after turning the key a good few times, if there's no light the car won't start and when the lights on it starts then after a few minutes it has a rough idle issue.
Had the car scanned with Vag Com and it showed up these issues
18062-Please check DTC Memory of instrument cluster
P1654-35-10- - Intermittent
17964-Charge Pressure Control
P1556-35-00- Negative Deviation
17552-Mass Air Flow Sensor (G70)
P1144-35-10-Open or short to ground - intermittent
18027-Glow Plug Relay (J52)
P1619-35-10-Open or short to ground - intermittent
So I replaced the Mass air flow sensor, Glow plug relay (Mine was relay number 219 not 109) and had the errors cleared. Then tried to start the car but still no glow plug light until a few turns of key then it would start and after a few minutes the rough idle was back again.
Scanned car again and its now showing 1 issue:
01314- Engine Control Module
49-10- No Communication.
Any help would be great as I'am starting to lose faith.