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Code 141

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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abscate
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Re: Code 141

Post by abscate »

Look very carefully at the white plastic top of the pump. These can crack at the hose fitting and seep gas onto the top.

My next trip I can drop a fuel pump and decent used rear OXS to you
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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5rivers
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Post by 5rivers »

THE Latest...the fuel pump did need to be replaced, the two outer circular plastic parts that fit together were not and the weight of the pump was pulling the two sections apart. I had previously replaced just the pump, but did not realize there were small clips that keep the two circular sections together (dah!). Picked up a used one that looked fairly new and installed that. The hardest part was getting the large black circular cap off (this part is most visible when the metal cover to the fuel pump is removed from inside the wagon) and then making sure the threads did not get crossed when putting the cap back on. Had to use a large flat head screwdriver and a small sledge hammer to secure the cap so the fuel pump assembly stayed in place (and prevent fuel seepage)!

Then, I spliced in a newer harness to the rear O2 sensor. That seemed to take care of code 141. Thank goodness!!

But, then...about 70 miles into my drive north from Syracuse and stopping for a Starbucks coffee, the CEL came back on :(
Code 133 appeared as pending and eventually made its way into the "freeze frame" on my code reader. I cleared it, but the same code came back as I neared my final destination. I had previously replaced the fuel pressure damper that is situated on the fuel rail, and cleaned the connection between the harness to the front O2 sensor and its mate below the brake fluid reservoir.

I will take a look at the harness for this sensor to see if it needs to be replaced. Otherwise, I am not sure what else I could do, short of replacing the O2 sensor. Any other thoughts, suggestions, remedies would be deeply appreciated!

Many thanks :)
5rivers
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims

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abscate
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Year and Model: 99: V70s S70s,05 V70
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Post by abscate »

P0133 is the front sensor problem. Start working the heat magic on that one
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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5rivers
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Year and Model: V70 1998 T5
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Post by 5rivers »

So as to replace the sensor?
5rivers
1998 V70 M56, silver/grey, has tranny issues, #?# owner, 330,xxx miles, a handy parts car
1998 V70 AT, nautical blue, 2nd owner, 260,000 miles, Sold
1998 V70 AT, T5, forest green, 3rd owner, 172,300 miles, Mimas 16" rims

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abscate
MVS Moderator
Posts: 35272
Joined: 17 February 2013
Year and Model: 99: V70s S70s,05 V70
Location: Port Jefferson Long Island NY
Has thanked: 1497 times
Been thanked: 3810 times

Post by abscate »

5rivers wrote: 26 Mar 2022, 17:54 So as to replace the sensor?
Yes, that one is probably dead with that code. Inspect wiring first, of course.
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread

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