Rough idle due to broken vacuum hose near power steering pump on Volvo V70

A broken vacuum hose near the power steering pump deteriorates and can cause a rough idle and the Check Engine Light to illuminate

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Average mileage: 115,000 (115,000–115,000)
Engine affected: w/o Turbo
4 model years affected: 1998, 1999, 2000, 2002
5 people reported this problem
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problem details
I replaced lots of the hoses myslef and it fixed the problem
2002 Volvo V70 - w/o Turbo 115,000 mi,
rough idea until warmed up