What causes the service vehicle soon light and abs and trac off light to come on in 1999 Oldsmobile intrigue?

Answer 1

Service Vehicle Soon comes on because an error code has been set by the on-board diagnostics. Could be any number of problems. You can read and clear this with an OBD-II reader, available for use free at several auto parts stores. The ABS light comes on when there is an ABS sensor error (likely a wheel speed sensor). This is not the same system as the OBD-II, and requires a different reader that appears to be only at brake shops or for sale at some auto stores. The traction control light is related to the ABS (wheel speed sensor usually), but should go off once the wheels turn normally. I'll bet you have a damaged wheel speed sensor. Driving with all these error lights lit may not be damaging the car, but I'd get them checked out asap for safety.

All three lights are connected. You probably felt the brake pedal pulsate first, then the ABS light lit, then a few seconds later the Traction light lit and finally the Service Engine Soon light.

The most common problem causing this error sequence is the wiring harness that connects the ABS wheel sensor to the system. I've repaired a number of Oldsmobiles as well as Buicks (Same basic car) byexamning the harnes and repairing the broken wires. Start with the drivers side front (most likely culprit)

Loosen lugs, turn heel as if making left turn till it stops, jack up car, remove wheel and support vehicle on jack stand. NEVER get under a car while it's being held up only by the jack. On the back of the wheel will be a plug that the harness attaches to. There are only 2 wires in this harness and you will need to disconnest it from the plug and the clips that hold it to the A frame. You may notice that there are kinks or even breaks in the the outer sheath, that would be a good place to look for the break. examine the the wire from the plug back about 12"-14". If you find the break you'll need to repair it ( I cut out the break and any corroded wire and solder a length of new wire in it's place) OR buy a reoplacement harness ... about $45.00. If you don't find the break on the driver's side put it back together and examine the passenger cable as well. Only when doing the passsanger side turn the wheel as if making a right turn.

Chances are you will find a faulty cable and repairing/ replacing it will solve your problem