2004 Chevrolet Express 3500 Q&A

2004 Chevrolet Express 3500 Question: what does code po137 mean when the van is idling high

when you start the van it idles very high continuous. code po137. -
Answer 1
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! -
Answer 2
agree with #1 -