Hi there i just finish overhaul my komatsu pc200-8 and showing e15 ca428. I have clean out all the cabel and sockets i also have a newly service injectors all 6 of them, cant figure out where this error comming from. Thanks
That code shows as water in fuel sensor high error. I have not worked on one of these machines yet so can't tell you what to look for other than maybe a fuel water separator with wires hooked to it some how.
Water in fuel error will still let the engine run. Anyway check the sensor and wire of the W.I.F filter and try start again