Question about 2008 Volvo S40

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Hi nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn wats happening iv got a volvo s40 the revs going up by them self the temp needld drops then shoots up that wen it starts happening its not over heating

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REPLACE YOUR THERMASTA OR THE SENSOR

Posted on Jan 16, 2009

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Some of the newer Volvo S40 cars also have electronic Accelerator pedals which affect a lot of the system when they wear down.

Posted on Dec 10, 2014

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Hi. Ihave volvo s40 1.9d 102 hp it lost power,makes weird noise at the back of the engine like whistling or rotten sprocket when revs go to 1800rpm, no smoke, nothing shows on dashboard drives ok. is


run fault codes and look for torque converter clutch solenoid/servo problems and TCM problem. Check oil condition and change if tan coloured.

Feb 09, 2014 | Volvo S40 Cars & Trucks

1 Answer

I have a volvo s40 2.0t se the other day after i came back from a trip it was on tic over out side the house wen the temp gauge droped to cold and the revs went up to 1200 and a strong smell of fuel was...


First things first. Check your coolant level. If that is up to snuff, then have the engine data scanned, and see if your coolant temp sensor is out of whack. If it reads very low, the pcm will give the fuel management system directions to add alot of fuel. However , as I mentioned before, low coolant can cause the temp sensor to read a cold engine(it usually must be submerged in coolant) and cause the same problem. There are more things to check, but this is the place to start. If you have no luck with these suggestions, get back to me and we'll go furthur. Good luck!

Apr 06, 2011 | 2000 Volvo S40

1 Answer

Hi! I`m looking for Inlet Air Temp. sensor on my Volvo s40 SX 1999.\r\nCan You help me? Best regards. Waldi


inlet air temp for the engine is located inside the MAF
the "air temp", like the one for the outside temp that is displayed on the dash is located in front of the condenser

Sep 23, 2010 | 1999 Volvo S70

1 Answer

Hi,Volvo s40 engine revs up to 3000rpm by itself,and will also drop in revs from tick over,then just cut out.Any suggestions would be appreciated cheers


Sound like the idle air control valve(IAC) is dodge, could try taking off and cleaning with carb cleaner, while doing that take off hose by throttle body and also clean in there inc butterfly, go and give it a good blast down the motorway !!

Dec 03, 2009 | 2002 Volvo V40 Wagon

1 Answer

Volvo S40 blower runs 12 to 15 minutes after turning off the car


Engine temp sensor or fan relay is going bad.

Nov 05, 2009 | 2000 Volvo S40

1 Answer

I have a toyota and my car is parked up for a few hours when i go


Does it run rough when stalling at 1000rpm or does it seem like the rev limiter is taking over (just revs and stope). If running and just stopping you man wanna have your ECU reflashed (common problem). If running rough you may have some other issues and need a diagnostic. Try going to your local auto parts store and having a code scan (its free) and see what codes if any are present.

Sep 02, 2009 | 2001 Volvo S40

1 Answer

S40 temp / over heating


hi its rob change the temp switch normly on the cylender head

Apr 26, 2009 | 2000 Volvo S40

1 Answer

Reving up by itself


I think one of your temperature sensors is gone.

Sep 23, 2008 | 2000 Volvo S40

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Aug 12, 2008 | 2001 Volvo S40

1 Answer

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My 1998 Volvo does the same sometimes. Better petrol helps for me, these engines like the higher octane petrol. My car does not like the BP petrol at all for example.

Jun 28, 2008 | 2000 Volvo S40

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