Chevy - Impala :: 2005 Overheating And Sensor Would Go Off Saying Coolant Temp Hot
Nov 20, 2015
Ok so I recently started noticing my car was overheating and the sensor would go off saying coolant temp hot. So I started by adding coolant that didn't work. I than replaced the thermostat didn't change. I saw the water pump was leaking and changed that but before I did I was driving it home one night and the engine stopped and I barely had control of the car. Now the water pump is new and I don't know what the problem is. I think it's the head gasket ???
View 6 Replies
Advertisement
My temperature has been randomly dropping, them back to middle, and recently my engine was overheating because I'm guessing the fans didn't turn on, because I'm also guessing, the engine didn't know it was overheating?
Anywho, during my replacement, I made sure to get rid of the pressure, and the car was cold. I tightened the cap again, but when I took the sensor out, all the coolant spewed out.
Now if I understand this correctly, do I have a leak? I figured the leak I had was coming from the temp sensor as it is.
Here's some pictures for those who'd like to see ....
View 4 Replies
I have a 2002 Chevy Impala with the 3.4L engine. The car has 180K+ miles on the original engine. The coolant temperature started fluctuating recently. Going from 200 degrees up to 240 sometimes 260 degrees.
I recently had the check engine light on with the P0420 code which indicates a bad catalytic converter, I had that replaced and I was hoping that maybe the lack of exhaust flow through the converter was causing the overheating. It is still fluctuating however after the converter replacement.
The coolant temperature seems to go up when the car is idling but when moving it starts to go back down to normal. I had the cooling fan assembly replaced last year after one of the fans failed. These are less than a year old and are both operating as expected.
A little history on the engine. It originally had that crappy DexCool in it that then ate away at the cheap plastic head gasket causing oil to leak into the coolant system. This caused the coolant to turn into 'mud' within the radiator and eventually the head gasket failed completely and I had to have that replaced along with putting in ethylene glycol to replace the DexCool. Now when the coolant system was flushed, I am not completely sure that all that 'mud' was flushed out of the radiator. So the radiator may not be operating at full capacity. In fact, driving through the mountains this summer going up inclines, the car would tend to start overheating.
So thoughts on what might be the issue, radiator, thermostat, sensor, water pump, something else? I'm pretty sure it's not the sensor because sensors don't fail in this manner (they fail either high or low). I'm leaning toward the radiator because once I get some air flow across it, the coolant temp gets back to normal.
Also, the A/C is sometimes working great and blowing really cold and other times it is just slightly cold.
View 11 Replies
I recently had an issue with my car overheating so I changed the thermostat. About 3 months later it happens again. I know I need a new tensioner arm but I decide to wait on it. I take it to a place and have the radiator flushed and the guy calls me back to the garage and says your belt fell off... i was like o man, so he showed me how it would slip off the tensioner and i said ok and put a new tensioner on. He called me back and said he found a new problem my crank shaft pulley was wobbling a little. I didn't have enough money to have him check it out further so he said he would just finish the flush and go from there. after he finished the flush he said there is still a problem with the heating on the car. He didn't know if the problem came from the pump, the t stat, or something like a sensor. and it would cost alot in research time for him to find the problem and fix it. so i am going to take it to another mechanic. I have replaced the pump about 2 years ago, I replaced the thermostat about 3 times before the flush over about 1 years time, i replaced the stepper motors on the gauges since they went bad. and now I am at a loss on what to do next. I just wish that click and clack would come fix my car.
View 5 Replies
Before someone says "normal" I know the low temp light is supposed to come on until the car reaches normal operating temp My problem is really strange and my mechanic and I are both perplexed. I have a 2008 Yaris automatic sedan with 98K miles on it.
The symptoms:
After driving for quite a while (30 minutes or more at times) the low temp light will come on... and sometimes goes right out... and sometimes goes on for a while.
If the check engine light isn't already on - it will eventually go on.
Sometimes with the low temp light is on - it will race the engine (just straight high rev) OR it will pulse the engine (like I am pumping the gas peddle) OR it will not let the car shift into high gear (rare). Remember... all of this happens after the car has been running for while so it warmed up.
What we've tried (over a 4 week period now):
The error code indicates to replace the thermostat - so we've replaced it... twice. We've replaced the actual low temp sensor. We've checked the wiring between the sensors and the computer - wiring does not appear to have a short. Last week we replaced the computer with a used one, but the same problem still exists with a replaced computer...
What the mechanic says now:Might be an air conditioning thing running the fan too long?
Can you really run a fan so long it will drop the car temp back to below the low range operating temperature while driving on a highway? That seems pretty unlikely to me.... If it were just a flickering light, I wouldn't be so concerned... but because it revs the engine (even when I am at a stop light and I have to push the brake harder so it won't start moving) and it sometimes wont shift into high gear... it's concerning from a safety perspective.
View 6 Replies
Have a 2000 subaru outback 2.5l, automatic, with about 245k, I replaced the thermostat,water pump, the radiator and the car is still overheating. both fans are working. no leaking coolant. Maybe this is related- over heats mostly when driving on the highway. But if a shift the gear to neutral and coast for a minute the shift back to drive the temperature gauge goes down. Whats wrong, running out money fixing the car, but love it driving it in the snow.
View 2 Replies
The truck has been just terrific, mostly used for towing our travel trailer. Earlier this year i developed a leak and lost 3 quarts of oil before I caught it. I would think with 15 quarts in her this shouldn't have been too big a deal. However, I am now experiencing 10-15 degree swings between ECT and EOT. Before I give the particulars, yes, I have had three new thermostats, two Ford and one brand X.
Anyway, coolant temps are 184-200 depending upon load, terrain, etc. At the same time, oil temps run 205-230. There is no oil cooler to get plugged up. She's got 120K on the clock, doesn't burn oil, no disappearing coolant. I am concerned about blowing a head gasket or other serious damage at these temps, but don't have a clue where to start? Yes, the fan does come on, but still this seems plenty hot.
View 14 Replies
So a couple weeks back I'm on expressway home and I look down and and temp gauge is pegged out overheating I immediately pulled off and shut it down and towed to a buddy of mine's shop he flushed it filled it up w antifreeze and checked for leaks and couldn't find one. I drove it for about a week and got out to for a quick stop , Ex parked on a slight decline and came out to prolly half gallon of coolant on the ground..I limped it to my buddies shop as it was not running hot .. he has checked it out but can't find any leaks, even after having it run 30 or so minutes..
View 6 Replies
I have a 2000 Celica GT and I suspect the coolant temp sensor has gone bad....the fans are not turning on and I'm not getting any hot air out of the heater.....where is the coolant temp sensor located on this thing?
View 4 Replies
Where is the coolant temp sensor on a 1.8t passat 04? I did a search but cant find any diagram
View 1 Replies
I was driving today when the CEL came on, I scanned the car which gave me 1 code: P1296.
I googled it and said it is possibly the coolant temp sensor?
The Engine temp was normal at 190' or just below even after quite a bit of driving today.
Would the problem just be the sensor or should I be looking for other problems as well?
The car is a 2002 B5.5 AWM 1.8T Tiptronic.
View 4 Replies
So my check engine light came on in my 04 jetta sw, and when I had the car read, it gave me a code that tracked down to be a bad coolant temp sensor. I bought the replacement part from my local VW dealership, installed it and the check engine light went away. Now about 2 weeks late it came back on, and I am getting a reading of "Coolant temp sensor high voltage". So it goes from needing replaced, then the replacement is running high voltage?
View 3 Replies
Threw a coolant temp sensor code yesterday morning:
16502 - Engine Coolant Temp. Sensor (G62): Signal too high
p0118 - 002 - Lower Limit Exceeded - Intermittent - MIL ON
Does throwing that code once mean I need to replace the CTS immediately or am I safe to clear the code and see if it returns? No code today after a 40 minute drive.
View 3 Replies
I need to replace my coolant temp sensor, but can seem for find where it goes. Bentley says it's on the rear coolant line, but that eludes me as well.
View 6 Replies
I have a B5.5 with the 2.8. I'm changing the coolant temperature sensor, but cannot get the thing out of the harness. With as tight as the working area is, I really don't want to screw-up the harness. How to get this out? I have the sensor out of the pipe the crosses between the heads and only need to remove it from the harness.
View 2 Replies
Experiencing cooling problems with a truck this new? My 2 month old supercrew 5.0 began over heating on a road trip last week. After about 400 miles of driving I see coolant temp start climbing until the overheating warning popped up. Pulled over, turned engine off, popped the hood and did not notice any obvious signs of overheating. Ended up waiting about 15 minutes, started truck up again, temp gauge reading 1/2.
Get back on the road, within 5 min temp starts climbing again, reaches ~ 3/4 then all of a sudden returns to 1/2. Continue on 10 min later temp gauge climbs from 1/2 to overheating quickly. I pulled over again same situation no obvious signs of overheating, but allow sometime to cool off. Started truck again temp gauge reads 1/2. Continue driving and temp gauge seems possessed, going from 1/2 to 3/4 back to 1/2 to almost overheating as I nursed it to the next dealer that I could find.
Dealer tech was able to mimic the problem and believes that coolant is not flowing properly. Thermostat replaced, water pump pulled and inspected, air bleed out of the system, all with no improvement. Now heads are being pulled/replaced to see if this solves the problem. Its depressing to have my new truck with 2,382 miles sitting under the knife at the dealer.
View 5 Replies
My CEL came on and the code said Coolant Temp Sensor High Voltage. Since there are 2 sensors, and my gauge isn't reading off, about 200F constantly, I assume the bad sensor is the water pump sensor. Also, is there a diagram of the sensorny locations and the easiest way to access them to swap them out. I have already purchased the sensor and gasket, just don't want to replace the wrong one or screw something else up in the process. It appears to be an easy job.
View 7 Replies
Where the ECT sensor is located? I would really like to have a diagram of the engine. Where I can find an engine diagram for a 2008 accent gls?
View 3 Replies
I just replaced my CTS, and I noticed that there is a small section of exposed harness wiring between the end of the loom and the CTS connector. I can't tell if it came loose when I swapped the sensor, or if it was this way for awhile, but all of the other harness connections around this area are completely covered and the loom end doesn't seem to clip into the connector or anything. If I were to try and seal it, I would need to use tape.
How hot does this area get? It seems like there shouldn't be exposed wiring here.
Picture taken with the new sensor: [URL] ...
View 1 Replies
P3081. What the hell is this code. I think it is a coolant temp. sensor issue.
View 3 Replies
So I got a 98 GMC sierra and the ect sensor that is on it only had one wire running to it. Obviously the previous owner tried to make something work. I bought a new ect sensor and pigtail to rewire it but can't find the ground wire anywhere. Looking for a wiring diagram?
View 14 Replies
