Check Engine Light P0172 bank 1 system too rich? - Volvo Forums - Volvo Enthusiasts Forum


Volvo S70 Made from 1998 to 2000, this sporty model replaced the 850 sedan and instantly became a hit.

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 10-04-2010, 06:44 PM
Junior Member
Thread Starter
 
Join Date: Oct 2010
Posts: 1
Default Check Engine Light P0172 bank 1 system too rich?

Anyone have any answers
Reply With Quote
  #2  
Old 10-04-2010, 09:10 PM
rspi's Avatar
Administrator

 
Join Date: Mar 2009
Location: Albuquerque, NM
Posts: 15,726
Default

Please leave details about your car when you post. That code is usually linked to a loose vacuum line. Often my vacuum line that connects to my PCV has come loose.
Reply With Quote
  #3  
Old 10-20-2010, 03:06 AM
Junior Member
 
Join Date: Mar 2009
Posts: 10
Default same problem

I have a 98 s70 and i have that code pop up from time to time. i have replaced both o2 censers. It all started after i replaced my cat it was plugged up. and i have had to replace the flex pipe.
Reply With Quote
  #4  
Old 11-02-2010, 10:01 PM
Junior Member
 
Join Date: Nov 2010
Posts: 29
Default Same for me

Please let me know where to locate the PVC Hose. This is happeng at 840 RPM Here's the stats: This is my first post so if this is too much info, just let me know: Replaced both 02 sensors last year and MAF 3 years ago-

Freeze Frame Information:
1. DTC for which Freeze Frame was Stored - P0172.
2. Fuel System 1 Status - Closed Loop - Fault With At Least One Oxygen Sensor.
3. Fuel System 2 Status - Not Supported.
4. Calculated LOAD Value - 2.75 %.
5. Engine Coolant Temp - 210.20 F.
6. Short Term Fuel Trim - Bank 1 - 6.25 %.
7. Long Term Fuel Trim - Bank 1 - -5.47 %.
8. Engine RPM - 840.00 Rpm.
9. Vehicle Speed Sensor - 0.00 Mph.

Last edited by Tdog; 11-02-2010 at 10:17 PM. Reason: too much info
Reply With Quote
  #5  
Old 11-04-2010, 11:56 AM
Member
 
Join Date: May 2010
Location: VA, US
Posts: 72
Default

Model year and mileage could be useful to guess what is going on.
BTW, I am no mechanic nor car expert. I am just a new Volvo owner who is struggling to keep my car on the road. What I notice unusual from my experience is that your LTFT is negative while you get rich condition code.
If it was from vacuum leak, I would expect a lot higher LTFT, as ECU would trying to compensate un-metered air.

So, what I would rather guess is something like this
https://volvoforums.com/forum/showth...ighlight=p0172

Well, I have to admit that this still does not make clear sense because your problem is under idling not under boosting.
In addition, if I have to use silicone sealer, I would use sensor-safe one.

Last edited by t5ftw; 11-04-2010 at 12:03 PM.
Reply With Quote
  #6  
Old 11-08-2010, 07:33 PM
Junior Member
 
Join Date: Nov 2010
Posts: 29
Default

Appreciate the feedback, mine is a base model, by accident I found a hose from the intake manifold that goes to the evap valve that was original and virtually fell apart while checking it. Replaced and so far no code :-)
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Not a head gasket leak; Running TOO RICH!! Check Engine code: P0172 grndslm Volvo 850 5 02-24-2014 12:01 PM
P0172 system too rich right bank 1 hotrods4ray Volvo 850 3 06-15-2011 05:10 PM
Could bad vacuum hoses be causing code P0172, "bank 1 system too rich"?? pnhons Volvo S70 4 04-16-2011 10:04 AM
P0172 System to rich bank 1 96850urbo Volvo 850 17 03-07-2010 11:32 PM
P0172 System Too Rich, bank 1 TheVolvoMan Volvo 260, 760 & 960 3 01-18-2009 04:40 PM


Tags
1, 27, bank, calculated, check, closed, engine, fuel, leak, light, load, loop, p0172, rich, s70, system, trim, vacume, volvo

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 06:11 AM.