Question about 2001 Volvo S40

1 Answer

2001 volvo s440 1.9t

Check engine light on 2001 volvo s40 reading coolant temp sensor where is this?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 580 Answers

Volvo Radiator, Thermostat and Sensors Your cooling system's temperature controls include all coolant temperature sensors, Volvo thermostat, Volvo radiator or expansion tank cap, cooling fan(s) and fan clutch (if equipped). These cooling system parts function primarily independent of the engine but control the engine either through cooling or by sending control signals to your Volvo's electronic systems.
The Volvo thermostat is a spring-loaded valve that opens and closes based on the temperature of the coolant flowing through it. A high temperature reading followed by a drop to normal temperature (or a continuously low temperature) is a common first sign of a sticking Volvo thermostat. However, many other conditions may cause these symptoms, so you need to know how to eliminate each possibility.
The Volvo radiator or expansion tank cap is also a spring-loaded valve reacting to system pressure. It serves to maintain proper system coolant level at predetermined pressures. It must always be replaced with an exact replacement cap with the same pressure setting. Never use other caps except for short-term emergencies!
A belt-driven fan blade for pulling air through the Volvo radiator is usually on the Volvo water pump pulley and should have a fan clutch to control it. The fan clutch allows the fan to turn with the belt at low engine speed and "free-wheel" at higher speeds. A bad fan clutch either doesn't allow the fan to spin at low speed (overheating in traffic) or doesn't allow it to free-wheel at high speed (potential overheating on highway or reduced gas mileage).
An electric fan can be either by itself (usually front-wheel drive) or auxiliary (used with a mechanical fan). Both types are controlled via a temperature sensor - in the Volvo radiator or upper Volvo radiator hose or on the Volvo thermostat or Volvo water pump housing. This sensor is usually an on/off type switch with a fixed temperature setting. (Some vehicles may have 2-3 settings for multi-speed fans.) This sensor is commonly called an "auxilliary fan switch".
Other common temperature sensors are: 1) gauge sender (variable output); 2) warning light sender (on/off type); 3) lambda and/or fuel injection sensor(s) (variable to control fuel injection settings); 4) thermo-time switch (cold start valve control). Your Volvo may have other sensors as well.
Temperature control is critical to both performance and emission control. Unfortunately, this system is the most difficult to troubleshoot without proper equipment and diagrams. It's even more difficult with computers that adjust timing, idle speed, vacuum and fuel delivery automatically to make up for potentially faulty temperature sensor signals.
Maintenance of your cooling system sensors is virtually impossible since there's nothing really to "maintain". Keeping them clean both internally (coolant replacement) and externally (engine cleaning) is the best way to ensure trouble-free driving. Checking and replacing all parts at the factory-recommended time or mileage limits helps as well

Posted on Jul 23, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2006 volvo s40 2.4I. Where is the ECT(engine


Instructions
    • 1 Open the engine hood by pulling the hood release latch located on the lower kick panel on the driver's side of the Volvo S40. Lift the hood up and prop it on the hood prop.
    • 2 Locate the steering shaft that extends from the firewall to lower suspension located inside the engine compartment, by the front right wheel. Halfway down the shaft, you will locate the power steering pump. The pump is a black container that bolts to the driver's side of the engine block. On the top, you will find a cap that says "Power Steering Fluid."
    • 3 Look to the left of the cap. Bolted to the power steering pump is the thermostat temperature sensor. The sensor has a black round cap and a black wire extending out of the top.


Read more : http://www.ehow.com/how_7439182_locate-temperature-sensor-volvo-s40.html

Jan 04, 2015 | 2006 Volvo S40 2.4i

1 Answer

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

1 Answer

2005 Volvo S40 High temperature light comes on and now it won't start


Seems like the temp sensor is grounded after the heat up, Unhook the battery positive terminal for 3 minutes, make sure the coolant is full in the radiator, hook the positive terminal on the battery and start the vehicle, IF it does not start scan for codes and let me know, what codes you find?

Jun 20, 2012 | 2005 Volvo S40

1 Answer

Where is the ECT sensor on a 2000 volvo s40


well lucky you i am a certified volvo tech,mostly all coolant temp sensors are located in the general area of the thermostat housing if not directly in it or on top of it,locate your thermostat and you'll find your sensors,also note that there is two one for the computer and one for the guage,good luck,should be easy from hear on in peace....!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Feb 28, 2012 | 2001 Volvo S40

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

S40 2.2 auto runs fine till temp is up then keeps cutting out ?


diagnostic check needs to be done could be coolant temp sensor or lambda sensor try cleaning throttle housing first

Dec 02, 2009 | 2000 Volvo S40

2 Answers

Replaced thermostat for 2001 Volvo S40, however, car is still reading as if it were hot. Coolant also added. What could be further issue? A sensor is what the repair garage suggested. Has anyone else had...


I recently took my car in for this problem. The thermostat was replaced a year ago. This time they replaced the thermostat and the IAT (air intake temperature sensor). The thermostat was 20 and the IAT was 50, with labor it all came to $140. Most sites online that I found suggested replacing both the sensor and the thermostat at the same time. When the thermostat goes, it usually takes the sensor with it. So I'd have them replace your sensor too. Good luck.

Apr 29, 2009 | 2001 Volvo S40

2 Answers

Where is the ambient temp sensor located on a 2001 S40 Volvo?


Go to Matthew's Volvo Site and search under "ambient temp sensor" I posted detailed instructions and pictures of how to fix this. Enjoy

Apr 16, 2009 | 2001 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

Not finding what you are looking for?
2001 Volvo S40 Logo

1,578 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volvo Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Volvo Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...