Last night the check eng light came on and then when I turned it off and started it up again it went away then today I took out the intake air temp switch which was full of oil inside where the pins are and cleaned it and drove around but the idle did not improve. It sat for a couplle of hours and the check eng light is on again and it set code p0560 "system voltage malfuntion" and then when I turned on and off the check eng light goes out again. Any ideas? Could this be where the idle problem is? It cranks fine and no other electrical problem is present at the moment....

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87 300d Turbo 241K with original #14 head (blue)
87 300d Turbo 198K will run great again someday (silver)
84 300sd sold ( buyer drove it to Paraguay )