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CODE P0172

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
This topic is in the MVS Volvo Repair Database » Volvo MAF Sensor Problem Solved
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dimasp28
Posts: 28
Joined: 31 October 2010
Year and Model: 850 glt 1995
Location: fort lauderdale, florida

CODE P0172

Post by dimasp28 »

Hi everyone !!! I'm Dimas and I own a '95 850 glt with 191,000 miles it runs very well, one month ago I did a tune up and changed the Maf sensor; this afternoon the check engine light turn on and I was near to an Advance Auto Parts Store so they check it and it shows the code P0172 and also said "bank 1 too rich" . Can somebody tell me what this mean and what I should do? Thanks in advance
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jblackburn
MVS Moderator
Posts: 14043
Joined: 8 June 2008
Year and Model: 1998 S70 T5
Location: Alexandria, VA
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Post by jblackburn »

Time to start checking for vacuum leaks! Look at any of your vacuum hoses on both sides of the intake manifold for cracking, split hoses, missing elbows, etc.

If you can't visibly spot anything, a can of carburetor cleaner sprayed around the lines will tell you if there is a leak if you hear the engine idle rev up a little bit.
'98 S70 T5
2016 Chevy Cruze Premier

A learning experience is one of those things that says, "You know that thing you just did? Don't do that."

mercuic: Long live the tractor motor!
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