Yup, it was the service interval. 168 on the 2007 coupe and 147 on the 2006 convertible. The coupe has only 16,000 miles on it and the convertible has 21,000. Haven't had to deal with the intervals much in the years I've had them and forgot. The Innova 5610 gave me the reset instructions and they both reset to 7,000 miles, not 10,000 as Wadsworth indicated. Thanks guys. BTW, there are DTC codes related to the fuel temperature system, but not the fuel temp itself.​​​​​​​