Question about 2000 Volvo S40

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Intermittant engine check light

My engine check light comes on at irreular intervals.but will go out after a few turns of the key.i have a 2001 s40 t4.is this common and or serious?

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This happend to me just bought the car??????? please help me as my light comes on randomly and then restart couple of times and then goes off? what hapend to yours?

Posted on Jul 15, 2009

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No serious but .have a OBDII code reader to see what is wrong. Free at autozone

Posted on Jul 14, 2009

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2 Answers

The engine management icon has come on car runs fine


Engine warning lights are programmed to go on at service intervals usually, they cannot tell that your engine is okay,they are switched of by a mechanic/technician after a service has been completed. Whilst your engine may be running fine it is wise to have a service carried out, it will increase the longevity of the engine. when cars are built the service intervals are set at
mileages known to be key to maintaining the unit in top condition, preventing a fast mechanical decline. I cannot exaggerate the importance of regular servicing irrespective of how well a vehicle is running. It is why regularly serviced vehicles are worth so much more than others of a similar age/mileage.

May 30, 2015 | 2001 Audi TT

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I have a 2001 Volvo S40 and the airbag light has been on and won't turn off and I have know idea why?


The (air bag) SRS System has to be diagnosed to answer that

Why was that not done when the check light issue was resolved

Your lucky you had no accidents as the air bag is most likely
turned off,so why have you waited 9 months

You clearly never want to use that repair shop again

Feb 07, 2013 | 2001 Volvo S40

1 Answer

Brake light switch on 2001 volvo s40=my brake lights work sometimes and don't work sometimes. I have checked all fuses and bulbs. I have tried fiddling with the brake light switch and can make the brake...


Yes switch is the problem. Volvo claim they sell very few switches, probably because people bought new cars instead. Problem can be associated with failed ignition coils (2 of) but one does not cause the other but very confusing. Engine fails intermittently or conks out.
Reset battery earth connection on chassis bad design here. Clean off paint and thread also bolt coating. Even better, use brass bolt but do not overtighten. Volvo will try to get you to replace alternator which is not necessary.
Failing battery will light up all the warning lights but will not isolate the battery so if it shorts car will die and not run on alternator. If this happens disconnect battery until you get to garage.
Now you know you can buy an old S40 with confidence great car and very cheap for what you get.

May 14, 2010 | 1991 Volvo 740

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My volvo s40 2007 mode display check engine.I have send to the mechanic .but it diplay again.Please tell me what to do.

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Intermittantly for short intervals while running


Make sure you replace the fuel and air filter.

Sep 03, 2009 | 1997 Buick LeSabre

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1998 VOLVO S70 INTERMITTENT CHECK ENGINE LIGHT, GOES OFF COMES ON NO EMISSION CODES


intermittent engine codes are not serious and it just indicates that one or more of the sensors is reporting a bad signal..at what ever time intervals.....this just means that as you drive , bad connections develops as a result of the movement for a second or long enough for the computer to detect a fault and then it goes back to normal....you can check for bad connections yourself by wiggling the wires with engine running and see if the light comes on ..which will tell you where the bad connection is and then fix it yourself or just wait until the connection gets really bad and the engine light stays on permanently .the computer will then store the code thats causing the fault and you'll know exactly where it's coming from.

silvio

Jul 08, 2009 | 2000 Volvo S40

1 Answer

2001 Volvo S40 - engine shuts off when i turn.


Is it possible you are using the service key which is grey in color as opposed to the black driver key?

Jun 14, 2009 | 2001 Volvo S40

1 Answer

Check Engine Light comes every few days


Is this an O2 sensor code? If so then check the wiring to the sensor. Since the light comes on every few days then it is intermittent. Once the fault goes away then the light goes out. Fault comes back and the light comes on. Check the wiring carefuly to insure there is not a bare spot somewhere and is touching the engine or some other metal part of the car. Check the connector to ensure it latches firmly. Check the terminals inside both of the connectors to make sure thye have not spread open, are not dirty, or corroded. I once found a connection inside a fuse panel on a 97 LHS car that was not stripped back far enough at the factory. This caused and intermittent open circuit to the fuel pump. I have also reapired many a lose and dirty connector causing the check engine light to come on. Also some aftermarket parts like O2 sensors, MAP sensors, etc are made cheap and fail soon after installation. You get what you pay for. Cheap is not always a bargain.

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2 Answers

I have ust serviced my 2001 volvo s40 and now the


did the sevice light come on before you serviced it? when you "serviced" it I assume you changed the oil and now need the service light reset.
I bought the 1998 S70. it got time to change the oil. Being how I am I changed the oil myself. I had to call dealership about resetting the service light.
they said $29.96.
I said 29.95?!!! how much if YOU would have changed my oil and reset the light?
they said $29.95.
so I learned you need to access the OBDII to reset the light.after service. hope this helps.

Jun 13, 2009 | 2005 Volvo S40

1 Answer

Volvo S40 OBD II P0171 & P0237


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Jul 22, 2008 | 2001 Volvo S40

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