I have a code 6D. Lift pressure sensor. I looked for the sensor and cannot find it. I suspect this truck does not have this option./ intellispeed only. When code 6 D comes it has no steering. Then drives slow and still has lift. You have to turn the steer wheel about 10 turns to make the drive wheel turn an inch and steer indicator does not move or change. I suspected this was a steer issue because if you turn the wheel while driving it would stop and code out and lose steering. I change the steer pot at the wheel and steer motor. It drove for two days with no issues until this morning and came back. Thanks Dan Ort