I have a 1998 Volvo S 70 which has failed DC inspection because the obd scanner used by the dmv cannot get a readout for catalytic converter, oxygen sensor and a couple of other emissions related items. The car ECU signals "not ready". the car runs fine. We have driven the car in Accord with Volvo's recommended "structured drive" which is supposed to reset the computer. This did not work. One Volvo shop believes the ECU is faulty. Another says the ECU is fine and its the scanner's inability to communicate with the ECU that is at fault. This shop also reports that he has seen several similar model Volvo over the past month or two with the identical problem. Meanwhile dv dmv says they cannot pass this car unless their scanner gets positive and acceptable readings.

- Washington, DC, USA