When your car is idling the temperature on your cars temperature gauge can go up because of faulty radiator fans or the whole radiator system. Not uncommon for it to drop 4-5 bars while sitting at a red light even after being fully warmed up.
Why My Car Temperature Gauge Drops While Driving Solved
High School or GED.
. The coolant temperature sensor is located at the back of the engine on the thermostat housing see diagram. If your temperature gauge rises when idling but drops when driving the cause is almost always a stuck open thermostat. Up to 8 cash back Replace the cooling fan clutch if clutch operation is erratic.
Here is a more detailed list of the most common causes when a temperature gauge stays on cold. Astraeither idling or in slow trafficeOncetrafficgoes down. When the temp gauge drops the engine is overheating somewhere else I can smell it.
Theyve also burped it numerous times. Once in free flowing traffic temp goes down again. So after a few minutes of my car refusing to start it finally caught and started.
This started soon after I replaced a cracked reservoir. Faulty Engine Coolant Temperature Sensor. The temperature drops due to the change of outside and inside air.
This can be why your temperature gauge goes up. Temperature gauge dropping while driving. If the temperature gauge still reads cold after the engine has warmed up the gauge may simply be broken.
My temperature gauge drops while driving and goes back to normal when at idle. When it is stuck at the open position what happens is. I am facing problem of dropping of temperature gauge while driving.
Jump to Latest Follow. The temperature gauge issue is likely due to a bad temperature sensor. It reads high resistance when cool and gets lower as it gets warmer.
On my way to work today I noticed that the temperature gauge was dropping way down when I was in traffic. The main reason why car temperature gauge goes up and down while driving is because something is not working properly in your cars cooling system. Your cars thermostat will open and close while you are driving.
Up to 25 cash back DR CAR. Replace the thermostat if the thermostat lets engine temperature get above 200 degrees F before it opens fully. Driving around town the temperature behaves normally - it sits at the middle of the gauge sometimes goes a little higher if Im sitting in traffic but not much.
Up to 8 cash back Reasons the Temperature Gauge Reads Cold. A stuck-open thermostat will constantly send coolant through the radiator regardless of its temperature causing coolant temperatures to drop and the heater to malfunction while traveling down the road. If the cooling temp drops the PCM is going to alter the air fuel ratio and this could cause a stall or poor running condition.
The temp never goes over 90 though. The primary reason your car temperature gauge goes up and down while driving is simply because a component in your cooling system is not functioning correctly. The internal resistance of a temperature sensor changes with the coolant temperature.
Diagnose and fix temperature gauge drops when driving issue. To fix either of these issues wed advise that you engage a proven auto mechanic. Its not likely the ETC either as the OBD reader shows the raw temp at 176 while the gauge is zerod pegged 100 deg.
Normally at the 14 mark2005 Doge Grand caravan with 105000 miles. 2001 Holden Astra Manual 18L 130000kms Temp gauge goes from 85 to over 90 when either idling or in slow traffice. This could be the thermostat valve radiator hoses radiator fan the temperature gauge or the coolant itself that circulates around cools off the engine.
It is because there will be a gap between heating system and engine cooling system not like in homes where we can control both temperatures individually. This morning even though Id been driving for 30 minutes on the highway I hit traffic and all of a sudden my motor temp drops to. Also ensure that you stick to a maintenance routine and.
As you keep driving and come to stops or traffic the temperature gauge may keep going up and down making it go up and down all the time. If the thermostat is behaving correctly it will only allow as much warm coolant out of the engine going to the radiator and cooler coolant to come into the engine as needed to allow the engine to maintain a temperature. This sounds like the temp sensor is failing or you have a connection issue.
The reason the temperature gauge drops when driving is because theres much greater airflow through the radiator when youre at speed than at idle. However on the highway the temperature slowly decreases until it sits just below the 14 mark. 7 Causes of Car Temperature Gauge Stays on Cold.
If the temps are going down when travelling at speed this means the thermostat is allowing too much coolant from the radiator into the engine and. Its cold out now 10-20and the temperature gauge is fluctuating up and down while Im driving. Fluid level is fine ensured all of the air is out as well.
Also when I have the heater on and fan on high the temperature gauge drops as Im going down a mountain and not pressing the gas pedal. After driving and I stop it also slowly drops while idling for about 5 - 10 min. Typically the temp gauge reads at about just under halfway and it never moves up or down regardless of whether Im on the highway or in town.
Why car temperature gauge drops while driving. Just recently I have noticed that the temperature gauge is sometimes slow to get to its normal driving temp 90 right in the middle but that and now when I am driving drops back down to 0 like I shut off the car then a little while later will shoot back up to normal temp. 2 people found this helpful.
Another reason the temperature gauge could read cold is if the thermostat in the. The thermostat should maintain the engine temperature at about 180 degrees F. So no real problem there.
Once back in city traffic it goes back up again and acts normally. When error is cleared using OBD gauge immediately goes to 176 so ETC is being read correctly. On most vehicles the temperature gauge reads cold until the engine has run for a few minutes.
A stuck-halfway valve will increase the time that it takes for your engine to warm up and will cause temperatures to slowly creep up under load. Yesterday the car was warm I got in it and it started blowing cold and the temp gauge went higher than normal almost at the half way mark. That increased airflow drops the.
The most probable reason why your car temperature gauge drops while you are driving is that your thermostat stays open. It could be the radiator fan water pump thermostat valve coolant or the gauge itself. Car is a Mk1 Golf.
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