1999 GMC Envoy "volvo error code 23" Questions

...error codes on the dash screen during startup. The moon roof and door locks won't work at all intermittently. Mechanics tell me that the car's computer might need a "$600" reprogramming to MAYBE fix ...

volvo s60 error code 23 what does it mean it say's anti skid sevice with code 23 It sound like a bad Yaw sensor,or ABS sensor,both are part of the Anti locking brake system.Have you brake system ...