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P0172 bank 1 too rich

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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Privatechef
Posts: 1
Joined: 21 August 2025
Year and Model: 1998 s70
Location: Ca

P0172 bank 1 too rich

Post by Privatechef »


Hi Matthew question pulling a code on my S 70 engine light on P0172 bank one to Rich any information to find a solution would be greatly appreciated
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abscate
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Posts: 35267
Joined: 17 February 2013
Year and Model: 99: V70s S70s,05 V70
Location: Port Jefferson Long Island NY
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Post by abscate »

If you have a code reader that can read fuel trims that is a big help.

Too rich...

Contaminated oil
Fuel pressure wrong
Leaky fuel injector
Vacuum leaks
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
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