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1998 Volvo S70 Check Engine Light Topic is solved

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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Volvo98T5
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Post by Volvo98T5 »

Bumping .........
Trilarry wrote:Take the Car to AutoZone or any Chain Autopart Store and Have them read the codes. Since the light came back it's indicating that there is indeed a problem. And yes there are many codes. write them down after Autozone reads them out to you and post them here.
Tri
Do I just tell Autozone to run diags for the check engine light ?

Ozark Lee
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Post by Ozark Lee »

In answer to your questions:

Yes, there can be hundreds of different fault codes that cause a Check Engine Light to come on. The code number describes the particular fault. As far as what to ask for at Autotozone/Advance/whatever auto parts store just tell them that you have a check engine light and need your codes read.

If possible have them print the code out or otherwise have a pen and a pad to write them down. The codes will start with a P followed by 4 numbers.

The free code reading service from some pimple faced kid that can't figure out how to run the cash register always comes with a suggestion that if you buy a new disgronificator ($ US 89.99) it will surely fix your problem. I would suggest that you decline and post your codes here. That will give us much more guidance in helping you fix your real problem.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

cyclmck
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Post by cyclmck »

green mountain wrote:I have a 1998 Volvo S70 GT that has had its CHECK ENGINE light come on 4 times in the past 5 months. The problem has always been a "gross evaporative leak" from the fuel system (per the fault codes pulled at the dealership and elsewhere). The dealer has replaced the fuel cap (and charged me for it), but otherwise insists the problem is not tightening the fuel cap. I HAVE been tightening the cap (its really not rocket scienc)-- it just pops off when tested moments later. Is there any other recourse to be taken with the dealership that others have found to work? The vehicle is under warranty, but the nuisance of this problem is making me sick. This is the fifth generation Volvo in my family, but my trouble with the car makes me want to head for the Honda store at times.
Are you sure that the cap is actullay coming loose after you tighten it, or do you mean that the light comes back on after you tighten the cap? Any leak in the evaporation system will set a code, or a problem with the fuel tank pressure sensor(which sends the signal to the Motronic, that decides there is a leak and sets a code).

Volvo98T5
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Post by Volvo98T5 »

Bumping...with a smile


Lee,

I finally had the diags run on the check engine light. The only code that showed was (as follows)"

"P0108 is Manifold Absolute pressure / Barometric pressure curcuit high input"

Please explain this code. I am confused by its meaning .....
Ozark Lee wrote:In answer to your questions:

Yes, there can be hundreds of different fault codes that cause a Check Engine Light to come on. The code number describes the particular fault. As far as what to ask for at Autotozone/Advance/whatever auto parts store just tell them that you have a check engine light and need your codes read.

If possible have them print the code out or otherwise have a pen and a pad to write them down. The codes will start with a P followed by 4 numbers.

The free code reading service from some pimple faced kid that can't figure out how to run the cash register always comes with a suggestion that if you buy a new disgronificator ($ US 89.99) it will surely fix your problem. I would suggest that you decline and post your codes here. That will give us much more guidance in helping you fix your real problem.

...Lee

Volvo98T5
Posts: 28
Joined: 22 April 2007
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Post by Volvo98T5 »

Bump me up !!!!

Yeah,

Does anyone know what this code actually means :?: :?: :?:

bakern
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Post by bakern »

Apparently the sensor you're having problems with is a pressure sensor that measures the altitude of the car - in other words an altimeter.
This helps provide information to the ignition system, which in turn uses this information (along with signals from a bunch of other sensors) to calculate the correct fuel mixture.

Read som place that the sensor is located to the right in engine compartment, in front of the washer refill.
You might want to check it out.

Oh and I stole this from BrickBoard:
_____________________________________________________________

High input means the pressure sensor is not responding to changes in pressure that are actually occurring. It is stuck at one extreme. Low input and intermittent input are other faults that can occur. See

http://www.obdii.com/codes.html

It might be a loose connection or faulty sensor (either manifold absolute pressure or barometric pressure sensors or both are used on various cars to provide a reference against which the fuel pressure is measured).

Indeed, though, it might not come back. The effect of the error might be a loss in fuel economy or minor driveability issues (and failure of an emission test). If it comes back and stays, you will be able to trace it.
_____________________________________________________________

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