Check Engine and strange code
We have an '03 Sedona with almost 80k miles on it. About a week ago, the CEL came on. My wife brought it to Autozone and a sales associate with a marginal grasp of how to use the scanner read out several codes. One was related to the gas cap and one mentioned the O2 sensor. I never did get any numbers.
I called our local Kia dealer who told us just to drive it for a few days to see if the error cleared on its own. When it hadn't after a week, I called them back and brought it in for them to read it. After a $90 diagnostic fee just to plug in their computer, they told me it came up with a code they'd never seen before. It took several hours with Kia to get a troubleshooting tree, and by the time they got it, it was the end of the day, so now I need to bring it back.
The two codes are P0456, "Small Evap Leak," which I know could be the gas cap. Their mystery code is P1159, which they list as "Variable Induction System."
Has anyone ever seen this code, and what was the resolution? I know my way around an engine, but I haven't ponied up the $150 to buy a shop manual for this car yet. Thanks.