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Q: what does code po137 mean when the van is idling high


on 2004 Chevrolet Express 3500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when you start the van it idles very high continuous. code po137.
(2) Answers
Possible vacuum leak causing increased engin rpm @ idle. Code PO137= downstream (behind cat. conv.) O2 sensor or it's circuits problem. Have a mechanic perform scan test to confirm!
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