2003 Volvo S40 - Answered Questions & Fixed issues

Time to change the thermostat if you not already have done so. This is the cause of most overheating problems, although a good radiator flush may solve the problem also. The fan will stay running until the engine coolant reaches the proper parameters and then shut off.

Has the blub been tested? Have you checked the headlight connector for power (12 volts) and a good ground (less than 5 Ohms) when it is turned on? Do that and get back to me

Corrosion/broken wires in the wiring. Yellow is B+, power all the time. I would just run another wire for it. I tend to run it to a B+ in the fuse panel. But you can run it all the way to the battery if you want. There are many wires under the dash to cut into. Ignition or fuse panel are the best to use. Stay away from really small wires, they can be for computers. I just use under dash b+ wires to save some one down the road headaches.

what year is your car and do you have engine light on what code do you show rich lean you need to do initial inspection first to be able to go in the right direction scan your onboard computer and get an idea and display your question all over again

I suggest running a scan on it. Product Search Scanner

Burning oil may be the cause of the rest. Bad PCV system? Worn rings? Bad valve guide seals? Fully describe how and when it burns oil.

could be dirty oil, worn rings, plugged PCV valve, worn valve seals, too much oil in crankcase, if its a v6 could be an internal intake leak. the miss fire is from it burning oil.

You have a Bad Radiator, replace it and get the Transmission flushed.

You need a Cam Locking tool. Volvo Camshaft Crankshaft Engine Alignment Timing Locking Fixture Tool Set...

This is how to replace the key battery:

It's best done from underneath the car. You'll need to remove the manifold heat shield first (from top and bottom) and then from underneath remove the down-pipe and cat converter. Once that is out of the way, soak the bolt threads attaching the turbo to the manifold with pbblaster or other rust loosening oil. (Repeat hourly for 3+ hours.) After several hours, use an impact wrench and appropriate sockets and extensions to remove the bolts from the manifold. On a car of that age, I would advise that it will be difficult to remove the bolts without one (or more) breaking off. An exhaust shop would be your best service for this.

You need to get a manual for this. Plus, do you have the tools to do this job. Believe me, you will need specialty tools. I would have to write a book to get you threw it. Good luck, if your a novice. Follow the manual.....

Obtain an OBD tester from your local Autoparts store. Run the diagnostic from the OBD port underneath the dash and see if you get any codes. Most likely you will and it will point you in the right direction. My bet is an ignition relay has died.

check see if your getting spark first use a screw driver inside one of the plug wires if it sparks your getting spark if its not you probly have a bad coil or distributor or plug could also be a timing chain issue with them they are known for that also

So you really have done nothing at all You never checked for codes You never looked at scan tool data You threw a part at it, with no testing You had the check light cleared & lost ALL Data needed to diagnose the car

Try this link for photos and instructions: Hope it helps. http://www.volvohowto.com/how-to-remove-and-clean-the-idle-control-valve-icv-on-1996-2004-volvo-s40-and-v40/

it could be two things 1 ignition barrel plug broken not allowing the ignition to turn off 2 ignition relay stuck check manual for location and give it a tap or remove it to find fault

well could be wheel balancing, rotors could be bending as some of the less better made do. check the tir rod ends, jack up the front of the car and see if you can move the wheel left and right and feel for play. they`re easy to change. make sure you calipers are tight also.

somebody has connected your wires to run all the time. the reason being so the car will not run hot.

sensor wire may be shorting out.sensor wire may be stripped and grounding against engine or other ground source.