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2001 S40 underboost code

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40
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BomTillington
Posts: 18
Joined: 24 November 2012
Year and Model: 2001 s40
Location: USA

2001 S40 underboost code

Post by BomTillington »

My s40 gets an under boost code when i really punch it but at normal driving speeds the code clears and its fine i was wonder what would cause this. please help i also have decreased fuel economy i only get 250 miles to the tank used to get almost 320. any info would help
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