Question about 2000 Volvo S80

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I have two questions regarding the check engine light stays on problem: 1. If replacing the fuel fill cap had already fixed the cause of the problem, is resetting the counter the only thing a technician has to do? 2. If the fuel fill cap and refilling fuel with engine running are not the cause of the check engine light problem, what are the other causes if there is any? Thanks in advance!

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  • Volvo Master
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There are hundreds of causes. Look here: http://alflash.com.ua/OBDII/EOBDcodes.pdf

You need to have the car scanned to get the codes. many parts stores such as autozone and advance will do a free scan.

Posted on Sep 10, 2010

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Posted on Jan 02, 2017

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2 Answers

P0172 fault code


It could be an emmissions problem. Sometimes even the gas cap being loose can cause a code. Make sure to tighten the cap when done refuelling...you should hear repetitive clicks when its tight. Other components related to code p0172 are o2 sensor(bank 1) and catalytic converters. Hope this helps!

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My check engine light came on code P0446; dashboard says "check gas cap" i took it off retightened it and check engine light still on. I noticed that the metal flap for the gas nozzle is...


The metal flap should not trigger the sensor. Once you tighten the gas cap you should clear the code and see if it comes back. Otherwise it will take a while to go away.
If it does come back even though the gas cap is tight it could be the rubber seal around the gas cap replacing that can sometimes fix this issue also.

May 04, 2011 | 2008 Jeep Grand Cherokee

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Check fuel cap light went on today. how do i fix it?


If you refueled your vehicle with the engine running, this is what caused the light to come on. Otherwise, your fuel cap may not be on correctly. Check your fuel cap and make sure it is installed correctly. Be sure that it "Clicks" when you tighten it. Then drive the car for a couple days and the light should go out on its own. If it does not go off in 2 or 3 days, then you need to have your evaporative emissions (fuel tank) system checked for leaks.

Feb 19, 2011 | 2003 Mercury Grand Marquis

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The engine light comes on. When the gas tank is


Most likely an EVAP code. Need to scan it to get the specifics.

Jan 05, 2010 | 2005 Jeep Grand Cherokee

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2007 ford explorer check engine light, and aslo the fuel cap light on. Causes? I have already checked the cap several times, and filled up a few times.


the problem is in the evap system, could be a vacuum line or purge cannister,check for nay loose or cracked hoses

Nov 16, 2009 | 2007 Ford Explorer Eddie Bauer

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Topic: 1990 1.8 L engine in Subaru Loyales. Loyale No.1 Engine check light is staying on after replacement of oil sending unit (oil gauge still doesn't show pressure), EGR value, and the oil fill cap. A...


have vehicle scanned for codes auto stores such as auto zone /advanced auto do it for free this gives u a starting point as for ur question about 25 different sensors there are about 60+ different codes and anything from bumper to bumper can set off check engine

Oct 18, 2009 | 1990 Subaru Loyale

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Check engine light comes on, gauges light comes on


What sensors did you replace? It sounds like a problem that could be caused by something in the evaporative emission system, like a faulty purge solenoid or evap cannister problem. Does the tank take fuel slowly when filling up? You could also have a faulty gas cap. That is the first thing I would look at. It is an integral part of the evap system. Hope this helps and best wishes.

Jul 23, 2009 | 1990 Plymouth Voyager

2 Answers

Check engine light stays on


1. I would check the spark plugs, spark plug wires and change them, if you have not done this already.

2. The change the fuel filter.

3. I would get fuel injector cleaner for the fuel tank and put it in the tank and bit the bullet and get premium fuel in the tank. I would fill up at least half the tank with the premium fuel.

Then drive it around .
4. I would consider changing the ignition coil.
Very easy repair that you can handle.
Just remove the bolts and disconnect the spark plug wire to it.

The dealer will do this type of maintanence to the vehicle and charge you an arm and a leg.
I would guess the part involve would be under 100.00 with out the ignition coil.

Dealer labor rates are between 80.00 to 145.00 per hour.

Finally , I would take to the mechanic after doing the above maintenance and ignition coil replacement.


Good luck

4.

Apr 01, 2009 | 2001 Dodge Caravan

7 Answers

Check Engine Light Comes on Intermittently


The P0141 code points to the O2 sensor heater circuit. It could be that there is a short in the wiring to the O2 sensor or it could be that the O2 sensor heating element itself is bad. The code is for O2 sensor Bank 1 Sensor 2. Bank 1 means its the O2 sensor connected to the exhaust pipe that runs to cylinder #1. Sensor 2 means that it is likely the O2 sensor after the catalytic converter on the same exhaust pipe.

Dec 31, 2008 | 2004 Honda Accord

2 Answers

Check engine light steady on. Replaced fuel filler cap. Problem still there. Disconnect battery. Light goes out but back in an hour or so.


Have had this problem more than once.

1. When you fill up with gas make sure you click the gas cap at least three times according to the manual.

2. When you have your oil changed make sure they push the reset button. Just tell them and they will know what you mean. If they dont, it can cause the check engine light to stay on.

3. Check your oil that can cause it, if the oil is low.

See if any of these work, they have for me in the past.

Good Luck!

Jul 28, 2008 | 2003 Kia Rio

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