Question about 1989 Volvo 240

1 Answer

Can A coolant sensor LEAK?

I've got a leak somewhere around the 4th intake(?) in my 89 Volvo 240. I believe this is near the sensor. Is it possible for this to leak? I can quite see the problem, as it is a minute leak that usually steams off before I can see it. Thanks, Mark

Happy New Year!

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 107 Answers

Yes a coolant sensor can leak. That is more than likely where the problem is. Order a sensor and change it out. Mike

Posted on Jan 06, 2009


1 Suggested Answer

  • 2 Answers

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

a 6ya Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

89 dodge ram truck 2500 2wd code reader says 4 codes dont know what they mean p1509, p1298, p0118 andp0113

P1509 Dodge - Leak Detection Pump Switch or Mechanical Fault

P1298 Dodge - Air/Fuel Ratio Lean Under Wide Open Throttle Condition
- Plugged air filter
- Plugged fuel filter
- Defective fuel pump
- Ignition system weak-misfires
- Defective coil

P0118 Dodge - Engine Coolant Temperature Sensor Circuit High
- Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor
- Faulty engine coolant thermostat
- Engine Coolant Temperature (ECT) sensor harness is open or shorted
- Engine Coolant Temperature (ECT) sensor electrical circuit poor connection

P0113 Dodge - Intake Air Temperature Sensor 1 Circuit High
- Faulty Intake Air Temperature (IAT) sensor
- Dirty air filter
- Intake Air Temperature (IAT) sensor harness is open or shorted
- Intake Air Temperature (IAT) sensor circuit poor electrical connection

Dec 16, 2013 | Cars & Trucks

2 Answers

Coolant leak under starter

If the water pump is near the starter it is in the
wrong place,it should be on front of engine.(sorry)
You could be loosing water from a pipe above the starter
one which goes to the heater.Although minor,it is leaking
onto starter and you do not want that.You must cover or
put something over starter to stop it getting wet,and this
is URGENT like yesterday. You will short the whole car
if not.

Feb 16, 2013 | 1989 Volvo 240

1 Answer

Losing coolant in my 2000 gmc sierra

These motors are famous for the intake manifolds leaking coolant.Have a pressure test put on the coolant system and look for a leak around the intake manifold corners.Check all four corners i've fixed many of these.

Nov 11, 2011 | 2000 GMC Sierra

1 Answer

Just re done top of motor. Everything together and I start it steam dumps out of the exhaust. I believe a water hose is wrong from the radiator somewhere. Need to know how to run the hoses. 89 iroc camaro...

Steam from the exhaust means, unfortunately, that coolant is entering the cylinders, and very little running like that will destroy the rings and pistons. It could be anything from an intake or head gasket leak to a cracked cylinder.

Aug 08, 2011 | 1989 Chevrolet Camaro

2 Answers

I have a 1991 Volvo 240 Iput in a new Air Mass Meter. It idles low and it cuts off. If I give it gas it will stay running. It idles rough and shakes.

Have you made sure that you have no vacuum leaks? Check the air filter and housing. It may be a leaking fuel injector or clogged fuel filter. Check any idle sensors or throttle sensors. The idle may need adjusted on the car.

Mar 08, 2011 | 1991 Volvo 240

1 Answer

I have a 2001 Oldsmobile Intrigue that has a small coolant leak. It appears to be leaking somewhere under the motor on the drivers side of the vehicle. I ran it up yesterday and the fans seem to cycle...

Could be intake gaskets, Use a rad. cap/rad. pressure tester, dont pressurize system higher than the rad cap is rated for(psi). You might find the leak that way.

Nov 11, 2010 | 2001 Oldsmobile Intrigue

1 Answer

I have a 2002 mini cooper s with an 02 sensor simulator on the downsream o2 sensor. the vehicle still displays a post cat system lean (P2096) code.

This could be for several reasons. I believe that the mini cooper uses 2 02 sensors, so it's possible that you have a faulty second sensor.
Or you could have a broken or missing vacuum line or intake manifold leak.
The other possible causes are a bad engine temp sensor, when the temp sensor is malfunctioning the computer may increase or degrease the fuel supply, If you getting a decreased fuel supply on a cold engine then you would have a lean exhaust.I would suggest starting with the easy stuff first, you can use a can of carb cleaner to spray around the intake and on vacuum hoses to seem if the engine picks up and idle or decreases in idle. This will tell you if you have a vacuum leak on a hose of manifold.
IF you can find a leak then I would suggest locating the other 02 sensor and use a simulator on it also.
And lastly if this didn't fix it then a test of the coolant temp sensor and the engine temp sensor would be in order.

Aug 07, 2010 | Mini Cooper S Cars & Trucks

1 Answer

My volvo 850 gets hot but the indicator of temeperature works and shows that dhe temperature is in normal levels, also dhe radiator signals lights on.

The radiator signal lamp is on because the coolant level is low (there is a leak somewhere). The temp indicator doesn't show hot because the sensor probably has no coolant flowing past it to sense the temperature. This should be repaired as soon as possible before the head gasket needs to be replaced.

Mar 23, 2010 | 1994 Volvo 850

1 Answer

I have a 2000 volvo 240 that idles and stalls.

before replacing any parts, check for vaccum leaks, volvo is pron for vaccum leak on left side of intake close to bottom of intake. also may have a bad o2 sensor. im surprised tech didnt give adefinate answer.good luck.

Oct 10, 2009 | 2000 Volvo S40

2 Answers


I recall reading somewhere that one of the fuses was specifically wired to serve the auto tranny's 4th gear. I remember it because it seemed really odd to me. I'm not sure if that's the problem, but it sure would be an easy fix... Worth a look!

Jul 27, 2008 | 1987 Volvo 240

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

97 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volvo Experts


Level 3 Expert

77202 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides