Question about 2001 Volvo S40

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I have a volvo 2001 s40, when I give it gas it hesitates and the check eng light comes on. I got it checked and my 02 sensor needs changed. I want to know what one cause I have two

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Normally its the 02 sensor nearest the manifold ( the first one). However I would be carefull before you throw to much money at this fault as these engines are also fitted in the Mitsibushi and are prone to decoke issues and faulty throtle body I have had experience with both types and after spending lots of money on both occasions ended up selling cars at auction as neither main dealer could solve.You can check the o2 sensor by using a multi metre where by the reading should fluctuate if the 02 sensor is working correctly. You can also clean the throttle body intake and see if this helps. Good luck.

Posted on Sep 07, 2009

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1 Answer

My Volvo s40 has started to idle low and stalls, this after a hot day with air con on...temp guage did not go up and spark plugs are black and are a month old..


sounds like its running rich then lean need to scan vehical could be 02 sensor me an mostly up stream ones change thos first or you have an exhaust leat throwing 02 s off or mass air flow sensor is bad scan car first take too shop auto zones scannners are cheap and dont allow you to test sensor or see values need for sensor

Dec 04, 2014 | Volvo Cars & Trucks

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Can I use lower ball joints from a 2001 s80 Volvo to a 202 s40 Volvo ?


better just to replace them you could damage the others taking them out

Sep 17, 2014 | Cars & Trucks

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2001 Volvo s40 seems to stall and not start for ten to 15 min. Also has high temperature reading that is false as car is not really hot.


You need to look at the temp sending unit it's probably faulty anthor issue with volvo is dirty throttle body's this raises havoc on the car they idle up down all over the map also you should change the thermostat too as a precautionary measure make sure it's the right temp for your year of your car thanx Chris

Mar 04, 2014 | 2000 Volvo S40

2 Answers

Have a 2.4i volvo s40 2005 lost power coming off a roundabout and wouldn,t start again had it towed home and friend plugged in a diagnostic computer and came up with code PA0089 fuel pressure problem does...


This is not always the problem. Have you changed the fuel filter, checked the relay, and checked the gas cap(This keeps the fuel tank under pressure). try these first, and hopefully this is it. hope this helps

Jan 16, 2011 | 2005 Volvo S40

2 Answers

Need insructions on how to replace 02 sensors on a 2004 Volvo S40.


1st lets look at the explanatioon of this code, it is not always the sensor at fault, the sensor can just be a symptom of another problem.

Causes A code P0133 may mean that one or more of the following has happened:
  • The oxygen sensor is faulty
  • The wiring to the sensor is broken / frayed
  • There is an exhaust leak
Possible Solutions The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
  • Check and fix any exhaust leaks
  • Check for wiring problems (shorted, frayed wires)
  • Check the frequency and amplitude of the oxygen sensor (advanced)
  • Check for a deteriorating / contaminated oxygen sensor, replace if necessary
  • Check for inlet air leaks
  • Check the MAF sensor for proper operation

Oct 02, 2009 | 2004 Volvo S40

2 Answers

2001 Volvo S40 sensors?


abs control module

Jun 30, 2009 | 2001 Volvo S40

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


for p0171 it could be a few things like intake/exhaust leak,air system,map/vaf sensor,fuel presure/pump,injector(s),ho2s(heated oxygen sensor.

Jul 22, 2008 | 2001 Volvo S40

1 Answer

Corolla, 2001


did you get the car on computer to see what our check engine light i seen problem with temperature sensor the temperature sensor if it defect let say in morning its colder like 60 degre 15 celcius but the sensor is reading 80 degre the computer will not give the same anough of gas hard start not enough gas hesitation hope it FIXYA our problem thanks pierre

Jul 04, 2008 | 2001 Toyota Corolla

2 Answers

2001 Volvo s40/ takes 5-10 seconds to start.


fuel filter is at right side of gas tank undernieth car
by pumping the gas all you are doing is opening the throttle plates alowing some air.its not uncomin for injection cars with higher mileage to need alittle more air for start up.
check ECT sensor.
clean throttle plates
is check engine light on?

Jun 22, 2008 | 2001 Volvo S40

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