check engine

[gilbertmonchat]

on a 6.5 turbo diesel 1995, i have my light CHECK ENGINE, go on at 50 km/h, and stay on , turn off only when the engine turn off, and coming on again when a go or past 50 km/h, i check for troble code and i have 88 in code, i disconnect all the batterie but coming on again at 50 km/h .....somebod can t help me ............sorry for my english

[DmaxMaverick]

Sounds like the crank sensor. It's behind the balancer on the timing cover. Check to see if it has become dislodged, or something has damaged it. If it's damaged, it's a cheap fix, and easy to do. They do fail with no explanation, but it is rare.

[gilbertmonchat]

thank you, i gone check than tomorrow,