About 4500 miles ago, I had the timing belt, water pump, thermostat, and all the accessory belts replaced and now, the water temp gauge sometimes rises rapidly from "normal" all the way to the "red" and back within about 15 seconds! This is on a 2006 Elantra GT
Should I replace the "coolant temp sensor" or do I have a real problem that needs repair?
So i decided to be a man and finish my 3.6vr in my gti project. Filled the coolant system with g13 and let the car run for a good half hour but the temperature only went to 130 degrees and would go back down to 120 and back to 130 and back and forth. With the heat turned on it was only slightly warm. Top hose was slightly hot and the bottom hose was just warm. So i tried massaging the hoses some more to let any air out and saw no bubbles. So i decided to go for a drive around the block and temps still stayed the same. So i'm leaning towards a thermostat but the motor was pulled out of a running passat with no problems.
Also its a brand new oem temp sensor
The needle is moving up and then back down. This mostly happens while at a stop and simultaneously the ac compressor kicks off.
Recently new radiator and temp gauge, plus coolant flush.
I have a 98 f150(4.6 V8) that has 'seemingly' overheated for about 5 seconds twice in the last month. I noticed the temperature gauge went all the way up after about 1 mile of travel, then it immediately fell back down to normal. The truck has 198k miles.
I flushed out the system using a Peak Flushing Tee, replaced the thermostat with spring facing the engine block, and refilled the system.
I haven't had another overheating instance but I am having problems with my heater....the truck seems to warm up fine and the heat starts off working well. The temperature gauge reads normal for a few minutes then drops and I lose the heat. The truck blows cool air for a while, then will start blocking hot air again.
I believe the water pump has been replaced fairly recently...the pulley has no slack and I don't see any leaks or wetness around the pump or its weep-hole.
I read it could be a blend door or blend door actuator. I don't hear any funny clicking and obviously get some heat.
Should I try another new thermostat? Intermittent water pump problems?
1998 Honda Civic EX. This has been a great car and have got a ton of good miles on it. The problem that I am having now is with the temperature gauge. The measurement is completely all over the place while driving. While moving around town, the gauge shows the temperature VERY hot. As soon as I reach a consistent speed, the temperature drops back to normal (moves very erratically!). The gauge seems to get even hotter while idling. Another issue (may or may not be related) is the heat coming out of the vents is only working while the car is in motion. While stopped, it pumps out cold air. The temperature immediately changes when I get going again. Both problems seem to be getting worse. The car has coolant, and all other levels of fluids are normal.
View 14 RepliesDuring the summer, my Celica runs just fine. Now, the temps are as low as the single digits outside (Fahrenheit). While I'm out driving, it can easily take 30 mile or more miles of driving before the engine finally warms up to the normal operating temperature, according to the dash gauge.
My mechanic is quoting me $135 or so to replace the thermostat. I haven't heard of thermostats getting stuck open and resulting in "under" heating conditions too often though.
Any thoughts on what the likely cause of this cold engine condition is? My gas mileage has also taken a good sized hit. Lost 5 mpg or so.
Can I just put a piece of cardboard in front of the radiator for the winter and call it good?
Our B5.5. wagon with 1.8t and automatic just went in for recall work. Embarrassingly, I don't even know what the recall was for, I only remember something about cars catching on fire.
Since we picked it up the AC only works for maybe 10 minutes at a time and then switches off. The engine temp gets really high and then cools back rather quickly. Occasionally the temp warning goes off. We scheduled an appointment to take it back in to the dealer but of course they can't take it till next week.
In the mean time, have any of you experienced something similar? Perhaps the AC goes off because of the engine temp sensor? Better to overheat the passengers than the motor? If so then the problem is the temp or the temp sensory?
Have a 2001 Subaru Legacy GT, 5 speed manual, 194,000 miles.
A few months ago, I started noticing that my cooling fans are running more often. Even when it is cold out and the temperature gauge was at normal temperature. The fans would turn on, and just keep running. Obviously, they would turn off when I shut the car off, but if the car is on, they will stay on. However, I found a trick to get them to turn off. If I am in neutral, and I race the engine up to around 3000 RPM's or so for about 10 seconds, and let it come back down to idle speed, the fans are now off. Works almost every time, not just a coincidence.
I know my car, and this has never done this before. I know it is not normal. I have replaced the following- thermostat, coolant temperature sensor, flushed the system, changed the fan relays, and most recently, I put a brand new Subaru radiator in. All of this, and the issue is still there. I am beginning to wonder if it is the water pump. Coolant not circulating fast enough, so the fans come on to cool down, but when I race the engine, the water pump works harder circulating coolant faster? Also recently, the temp gauge starts to climb going up long steep grades. If I pull over and race the engine, the temp gauge drops almost immediately back to normal. The pump is not leaking or making any noise, so I'm not sure if it could go bad any other way.
I have a 1.8T with 152kmiles
Recently, both the coolant reservoir 'Y' connector and the driver side coolant flange cracked and I was shooting G12 all over the engine. I've replaced both of the parts and the coolant temp sensor with a "green top". Reservoir was refilled with the proper ratio of G12 to distilled water, ran for a bit and topped off accordingly.
This morning I started my drive to work and the engine temp was at 0 for a minute or so and started to climb slowly to 190. It stayed at 190 until I took the exit to the highway and the temp slowly started to rise while I was at 60mph. I immediately turned around and went back home with the heat cranked to high. With the heat on, the engine temp would slowly go down but then rise again if I, A. turned the heat off or B. made a hard pull up to ~55+mph.
I popped the hood and the coolant was not boiling and I couldn't see/smell/hear any leak. could this be the thermostat or is this a water pump issue? I plan on taking the thermostat off and checking the pump empellars for any shards. I'm not sure but I do believe the water pump was replaced by my parents while I was on deployment.
Something strange started happening to my '04 Prius yesterday and it happened again today. We are experiencing unseasonably warm temperatures here in Western Oregon for October and when I left my house this morning at 6:30 am, it was about 55 degrees. I have a half hour drive to work on a mixture of expressway, freeway, expressway again and then the two-lane highway.
Anyway, yesterday (and today) when I'm almost to work, my temp. gauge drops down to 37 degrees. This causes that yellow light to start blinking indicating that the engine will not shut off because of cold temps. It will warm back up to 45 degrees a minute or two later. Why is this happening? It for sure is not 37 degrees outside. Is my temperature sensor going bad? Is this exhibiting the behavior of a sensor going bad?
My 2002 Elantra (about 276,000km) had some kind of leak in a power steering return line. A mechanic looked at it, said I needed to order the replacement part from Hyundai. Got the part, the mechanic (not Hyundai) took 2 hours and fixed the line.
Driving away from the mechanic, I noticed the front right turn signal was blinking abnormally rapidly. Left turn signal is fine. I call the mechanic, tell him what's happening, and ask if it might be related to the power steering line fix (after all, they're both in the right front side of the vehicle). He swears up and down he touched nothing having to do with the turn signal.
Okay, maybe it's just a coincidence. I buy a new signal light and put it in. Same thing with the front right turn signal blinking too rapidly. While driving back from replacing the bulb, a car cut in front of me and I went to lay on the horn....nothing happened!! No sound. To top it off, for a while now, the dashboard lighting has been dimming slightly at certain times.
What could be causing all this? The alternator is fine, someone tested it.
2nd time happening to me: I started my car, backed up and drove few hundred feet before stopping at a traffic light.
While stopping there, I noticed the engine cooling fan was running at max and the temperature was going rapidly up (in less than 10sec the gauge almost hit the red line).
While the gauge was going up I shifted the gear stick to P and the gauge dropped to normal in less than 5sec.
I shifted back to D and the car drove normally ever since.
My 2001 Hyundai Santa Fe V6 is giving out a P0118 code, and the "freeze-frame" data reports a -40F for the coolant temperature. That doesn't make sense so perhaps the sensor is faulty or perhaps the sensor connector is loose?
I'd like to take a look at the coolant temperature sensor but I cannot find it. I have scoured hmaservice, hyunda-forums but all the various pics are still not clear enough for me to actually find the sensor. I have seen all the online pics from Hyundai but I can't get my head around exactly where the sensor is - the pics are either too zoomed in or so many things have been disconnected for the purposes of taking the picture I can't get my bearings.
Just got the 2010 passat two days ago. As you know, when you press the accelerator, the E brake releases. When i do this, the back of the car rises up just a bit as the brake hasnt fully released, but can this wear out the brake quicker, since im effectivly driving with the e brake half on for that half second. Im pretty sure it wont as I think it uses the rear disk brake for the E brake, but curious what others think.
View 13 RepliesI drive a 2001 Jetta with the 2.8 v6 with ~125k miles
So for a while my car was giving me a false read on my temperature so I replaced the sensor. I actually followed instructions from a thread on this site. [URL] ....
Now when I go to drive my car, it runs sluggish and misfires if I really give it some gas. CEL is on(however does not return a code when hooked to a computer), and flashes when gassed hard.
I've checked to make sure spark plug wires were reconnected correctly and securely. No leaking has occurred from the temp sensor. shift rod drive unit is reconnected correctly.
My vr6 some times loses its power but it's weird because the check engine light does not appear. It does for like 30 seconds then it goes back to driving normally.
View 1 RepliesMy car (200,000kms - 5spd). Just noticed today that the gauge is not moving at all. Heat comes out of the dash vents no problem. Could it be the thermostat? Or is it the gauge it's self?
View 2 RepliesLast week I noticed an erratic temperature gauge while I was in stop-and-go traffic. It would go from just below halfway to nearly the red in about 7 seconds, bob around, go down a bit, then up, back down to halfway and sit for a while, etc. etc. etc. I stopped, added a little water to the reservoir and car was fine for about 20 minutes but then it started up again.
Went I got home I checked oil and it was low. I added a quart. After this the car has been fine.
Until today. It did go into the red a couple of times and sat there for a few seconds. I was surprised there were no lights or warnings of overheating! I opened the hood when I got home and didn't get the impression that the engine was particularly hot (though the upper radiator hose was hot).
I read this might be caused by air pockets in the cooling system and I need to "burp" it by taking off the radiator cap, starting the car, running the heater, and then topping up the radiator when I see the coolant level go down.
P0420 code. Catalyst Efficiency Below Normal (Bank 1)
This was the explanation I got from autozone. First question is how serious is this? The car seems to drive fine and normal, but I just purchased this car about a month ago. The light turned off after the guy at autozone plugged in the scanner. I am sure it will come back on again after some driving. Is it ok to drive with it on?
Fluctuating temperature gauge? In the past few weeks I have noticed that my temp gauge goes over the normal temp line but the car never actually overheats. This doesn't happen all the time and only every once in a while. Today however, the gauge went very high and I immediately put the heat on high and it slowly dropped to normal again.
I had a water pump replaced several years ago and last year had the thermostat replaced as well. The only thing I have had done recently was an oil change at one of those convenience stations. During the check-point, I was asked if I wanted the filter changed that filters the air coming into the car. I said no, but now wondering if they actually disconnected something when checking for this. The reason I'm bringing this up is because sometimes I don't get hot air when the heat is on or cold air when the a/c is on.
After reading online more about this, I read that a faulty Temperature Sensor can give a false reading. Just added some water to the radiator but not much...so no leaks that I can see.
I went to my local Autozone today to have a code read and get the freeze frame data. I got a code P0118, Engine Coolant Temperature Circuit High Input. I called the dealer but they are out of stock on the sensor. Would it be a problem to use an after market sensor? I'm just concerned about the quality and accuracy of the sensor.
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