Question about 1997 Oldsmobile Aurora

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Where does the coolant sensor go? overheating problem when speed goes over 45mph

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Should be near thermostat housin or in intake manifold

Posted on Jul 21, 2009

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Ecs light is on in my '85 subaru wagon gl, the computer flashes red 2 slow 4 fast. What does this mean? my car also will not go over 45mph.


Its in limp mode to prevent damage due to major malfunction... this is exactly what its supposed to do when something goes wrong... take to have the codes read and post which codes were present. Good luck and ill wait to hear back from you. Mark

Dec 30, 2013 | Cars & Trucks

1 Answer

Overheating with AirCon ON, OK with Aircon OFF


if engine over heating coolant over flow jug will boil over you will see steam.sound like you have either faulty engine coolant temperature sensor or could have faulty fans relay or fuse or pcm problem if coolant fans dont turn on.have garage with code scanner that can do a snap shot on coolant temperature sensor check see how hot coolant temperature is see if coolant temperature over 220 degrees engine getting too hot.could have faulty water or blowed head gasket check engine oil on oil dip stick look milkly you have blowed head gasket. i use infra red laser thermometor check see how hot engine is over 107 celsius engine is overheating.

Dec 10, 2012 | 2000 Toyota Sienna

2 Answers

The trouble began by my van not shifting out of 2nd care... van had gone into limp mode. Shortly there after, the engine light came on and my van started to overheat. We ran the codes and got PO720,...


Hi,
The codes you gave are:
P0720 = Output shaft speed sensor error P0731 = First gear incorrect ratio Replacing the Output shaft speed sensor should clear that up and help your transmission. Around $20 or so. The limp mode is probably caused by a faulty cam position sensor or crankshaft position sensor. Overheating: Did you verify that your cooling fan is coming on? Kicking into a higher speed with the A/C on? Thermostat of the correct heat range and installed with spring end into engine block? Coolant is not rusty looking or weak? (check specific gravity) Flush and refill system if not nice and green or orange/ is rusty looking. Water pump is circulating coolant properly? (open radiator and observe circulation, feel top hose for fluid surging) if not, bad pump. Any of those will cause overheating. Hope that helps! Please rate this answer.....Thanks, Mike

Jun 14, 2011 | 1996 Dodge Caravan

1 Answer

My Mazada 2000 MPV seems to be overheating when driving at a high speed or going up hill. The egine smeels hot but none of the gauges are showing as overheating.


Check coolant level. if its ok than ride. If from expansion cap coming some flush or many many coolant aut check thermostat and check cooling fan system is sensor ok and relay.

Sep 21, 2010 | 2000 Mazda MPV

1 Answer

My 2007 Impala LS says its overheating shut off A/C the temp gauge goes all the way up then in an instant comes back down to normal


CHECK COOLANT LEVEL TO MAKE SURE NOT LOW.IF ALL LOOKS GOOD.CRANK ENGINE LET IDLE FEW MINUTES TURN ON AC MAX LEVEL TO SEE IF COOLANT FANS COMING ON.IF NO CHECK COOLANT FANS FUSE AND RELAYS.IF COOLANTS FANS COME ON WHILE ENGINE OVERHEATING THERMOSTAT BAD.IF ENGINE OVERHEATING FANS NOT COMING ON YOUR COOLANT TEMPERATURE SENSOR FAULTY.

Sep 01, 2010 | 2007 Chevrolet Impala LS Sedan New Cars

1 Answer

I have a 1999 jeep cherokee that has intermitant transmission problems 1)shifting up it wind out to 2k-3k before shifting 2) at higher speed it feels as if it slips out of overdrive rpm increase but speed...


It will shift out of overdrive upon increasing throttle , pulling hills and so on. Your overdrive probably kicks in around 35 to 45mph and kicks back out as you increase throttle. Electrically controled speed sensor to control the response. Overwise the engine would bog down to a stall. Over drive is just that. It changes the gearing ratio to over drive meaning less then final gear 4 to 1 down to 4 to 3 etc more direct drive ratio to lessen consumtion of fuel with less stress on engine. Have shift speed sensor adjusted. Don't drive in overdrive in city if most driving is under 45mph

Mar 09, 2010 | 1999 Jeep Cherokee

2 Answers

The coolant light keeps coming on but the car is not overheating. it does leak coolant every now and again not all the time.


it is the coolant level sensor that is making the light come on, your car does not have to be overheating for it to come on.
once the coolant level goes below the sensor it turns the light on.
If you fix the leak it will stop the light going on unless the sensor is faulty.
Hope this has helped.

Jun 17, 2009 | 1999 Oldsmobile Alero

2 Answers

Speedometer erratic/intermittent


I don't know what is causing this problem, but I know phil140701's answer is completely wrong on two counts. First, 740 Volvos starting at least in 1986 have electronic speedometers and no cable. There is an electronic sensor on the differential which sends a signal to the speedometer cluster. Second, if it were strictly mechanical with a cable then the voltage regulator could have no effect on it at all.

Dec 29, 2008 | 1991 Volvo 740

1 Answer

96 cavalier overheating


You have a front wheel drive car so it requires and electric fan motor which in turn requires a temp sensor to tell it to turn on. The sensor should be on the radiator itself. Check that the connector to the senor and the motor are tight and if the wiring checks ok then I'd go for the sensor first.
The reason it cools while driving is the natural flow of air at driving speed.

Jul 16, 2008 | 1996 Chevrolet Cavalier

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