I have a 2001 Jetta TDI with about 85000 miles on it. The check engine light came on at about 80k and I took it in to the dealer. The diagnostic tool gave two erro messages - 0380 and 1248. The dealer said that 0380 mean that the glow plugs could be faulty and causing both errors. I tested the plugs, found one bad, and replaced the plugs. This stopped the ligth for a while but it eventually came back on. It would stay on a little while and then go back off but this kept repeating until eventually it starting staying on all the time. The car drives fine and still runs great. When I looked the error message up in my service manual it called it the Injection Start Control Deviation. Does anyone know what could be causing the error? I have looked around online and found a few things that it might be (faulty relay and clogged intake manifold) but none of the symptoms completely match what I am seeing. Can anybody help?
Thanks,
Nick