Warnings from automakers prior to the launch of onboard diagnostics (OBD-II)-equipped cars that there would be a lot of false or misleading fault signals are proving to be very real. WEVTU reported July 15, 1999 that 75% of dash-mounted fault signals had been found to not represent emissions failures, according to one industry executive engineer. A specific experience illustrates the problem and reason for consumer distrust of OBD-II. A motorist left Milwaukee, WI, on Dec. 23 in a 1996 ...

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