Top 10 2001 Volvo S40 Questions & Answers

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.

volvo s80 y reg 2.4 runs ok little bit lumpy tickoover when warm but very loud whistling noise take dipstick it stops but very big suction from tube not pressure it is not breather box under manifold

your IAC valve, idle air control valve is under the black plastic cover on the front right corner on the engine, remove cover undo valve, renew gasket and re install. ade 13 years volvo tech

Very easy to swap the vvt valve,but that will not guarantee to rectify the problem,more than likely it will be the vvt pulley/timing unit,this will involve the timing belt coming off.
The vvt valve is located under the upper timing cover,remove the cover and you will see the valve situated on top of the head,undo the connector and remove the 4 bolts and the valve will come off,alittle bit of oil will come out on removal.
remove gasket and ensure the area is clean.
Re-fitting is opposite procedure,ensure a new gasket is fitted.
Hope this helps

My son was missing with the valet parking key while I was driving. When we got home and tried to open the trunk it wouldn't. It also made this buzzing sound when I push on the trunk latch.

This is a common issue particularly with vehicles that have had some neglect to the oil change routine. The VVT solenoid on the top of the valve cover gets clogged with thickened or sludged oil.

Replace the VVT solenoid and gasket with a new unit and clear the codes.

You car has an integrated key and remote.

There is a software that needs to be downloaded to the car. When the remote is purchased at the dealer it comes in a plastic package. That plastic package has a sticker on it. The sticker contains id codes.

There are two codes one is 16 digits/letters and the second one is 8 digits/letters.

Without this sticker the dealership can not program the remote/key to the car. If you buy a key elsewhere, make sure it has the codes included.

Unfortunately you cannot program a remote yourself.

press on, enter your security code, if you enter wrong 4 digit code the display is OFF or EEEE, wait 2 hours to enter code again

WHAT KIND OF PROBLEM YOU HAVING.

i took the exhaust cam pulley off my 01 s40 while replacing timing belt and seals. in doing so the camshaft moved out of time. now i am lost because i cant find a timing mark on the shaft itself. does anybody know how to reset the exaust cam to where its suppose to be? i could not believe the pulley was'nt keyed in or something. please help!