One problem related to brake antilock wheel speed sensor has been reported for the 1998 Oldsmobile 88. The most recently reported issues are listed below.
The "abs" and "traction control off" indicator lights started to come on and stay on some time in November 2000. I called the service dept. At the dealership and was told that there could possibly be ice buildup which causes the speed sensors to go off. The cost to replace any one speed sensor was approx $450-$500 per wheel hub. In July 2001 I took my car in to have the abs and tractioncontrol issues fixed. The abs and traction control issues were fixed by replacing the "brain box" for the speed sensors. Two weeks after the fix, the abs/tractioncontrol off lights came on again. I took my car back and they then found the break pressure modulator valve had a dead spot in the armature. To replace the bpmv will cost approx $1600. These issues all seem to be electronic. Do you know of any issues with the abs or traction control in this car? thank you.