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fault code 0172, system too rich bank 1

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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twilightflyer
Posts: 3
Joined: 7 August 2008
Year and Model: V40 1998
Location:

fault code 0172, system too rich bank 1

Post by twilightflyer »

can anyone let me know what to look for in rectifying this error code.I have changed the engine coolant sensor and the MAF sensor,but no difference.
regards
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jtz54
Posts: 19
Joined: 30 March 2008
Year and Model:
Location:

Post by jtz54 »

I got this code when a hose broke going to the idle air control valve broke.
Other symptoms included bad idle at first start and lack of turbo boost.
Fixing the hose fixed all the problems.
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