On my newly acquired 94 855 T5M I have a massive exhaust leak and a check engine light. THe blinky box didn´t throw out anything I could identify during a snowstorm when I bought it. Just wondering if a crack in the exhaust could cause the CEL? I think yes if is between Oxygen sensor 1 and 2 (downpipe, cat).
Also, the Turbo works really fine, not the boost gauge. Could a broken vacum hose to the gauge cause a CEL as well? Just thinking about this because the car is at my indie getting all the holes in the body welded up and I´m thinking about what to do to get it driveable.
Can a rusted through exhaust cause a CEL? Topic is solved
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rspi
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Contact rspi..
What is the code?
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
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'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
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Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos
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Clemens
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If only I could remember. It was cold and I was young and needed the money... You know how these stories end.
Seriously: I need to lool it up again as soon as I get it from the mechanic who does the safety inspection. Without the code it is just guessing. I was just wondering if this could theoretically be the cause.
Seriously: I need to lool it up again as soon as I get it from the mechanic who does the safety inspection. Without the code it is just guessing. I was just wondering if this could theoretically be the cause.
1996 855 R,
black on black, M56 swapped, Quaife, TME 2.5 exhaust, 17 inch Volants
2010 V70 D5,
Saville Gray on tan leather, 18 inch Odysseus
black on black, M56 swapped, Quaife, TME 2.5 exhaust, 17 inch Volants
2010 V70 D5,
Saville Gray on tan leather, 18 inch Odysseus
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wizechatmgr
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I would doubt it unless it was before or between one of the two oxygen sensors. Take that with a grain of salt as I'm a volvo newbie...
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
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Ozark Lee
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Sure, either one or the combination of the two can cause a CEL. The boost gauge is fairly simple to trace, at least back to the firewall and often it the hose slipping off of the hard plastic pipe up near the radiator. The front oxygen sensor is the most sensitive and an exhaust leak ahead of that will jack up the fuel trim.
...Lee
...Lee
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Clemens
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Thanks. That's what I wanted to know
1996 855 R,
black on black, M56 swapped, Quaife, TME 2.5 exhaust, 17 inch Volants
2010 V70 D5,
Saville Gray on tan leather, 18 inch Odysseus
black on black, M56 swapped, Quaife, TME 2.5 exhaust, 17 inch Volants
2010 V70 D5,
Saville Gray on tan leather, 18 inch Odysseus
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misha
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You allready answered to your own question.Clemens wrote:...Just wondering if a crack in the exhaust could cause the CEL? I think yes if is between Oxygen sensor 1 and 2 (downpipe, cat)...
I would just add....there is one more point which is a flexible pipe between exhaust manifold and cat(manifold & front o2).
If the car have just front o2 sensor...every exhaust leak after it CAN'T trigger cel.
If there are 2 o2 sensors,every leak after rear o2 sensor CAN'T trigger cel.
That's it.
2010 S80 D5 / restyling / fully equipped / Twin turbo / Savile Gray Metallic (492)
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
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