2007 Lexus IS 250 "d4d vsc" Questions

D4D 2006,warning lights check engine,vsc,4wd system fault displayed. Took to dealer for diagnostic check ,error code p1238 injectors they said. quoted me £2100 to replace all units. only 2 months

...D4D, 2007. Speed Sensor A yellow engine icon is showing on dashboard together with TRC OFF & VSC. I had it looked at and was told it is Vehicle Speed Sensor. Not sure if it has something to do ...