Why does the Check Engine light come back on after replacing the thermostat?

Table of Contents

Why does the Check Engine light come back on after replacing the thermostat?

His reader indicated it was a thermostat problem. I just want to know why the check engine light came back on after the thermostat was already replaced. If the check engine light is coming on and a code like P1217 is in the computer then the computer is seeing an overheat conditions from the coolant sensor telling it your engine is overheating.

What does the check engine warning light mean?

The check engine light will usually come up in an orange, yellow or amber colour depending on the manufacturer, and a flashing light usually means there is a more serious issue. A flash when starting the car isn’t an issue, it’s just a check by the ECU to make sure the system is working. Can I just ignore a check engine warning light?

What does a service light on your car mean?

A service light means that you need an oil change or other similar maintenance, bear in mind that if the light is ignored it can easily lead to a check engine light, as your engine will grind to a halt without oil.

Can a check engine light get clogged up?

The EGR valve can get clogged up or fail entirely. If you’re even slightly mechanically inclined, you can remove the valve, clean it up, and reinstall it in a relatively short amount of time. If the valve needs to be replaced, expect to pay at least $125 for a brand-new, OEM-quality unit.

What’s the best way to reset a check engine light?

In such a case, it is highly recommended to check the codes with a scanner instead. Switching the ignition on and off is also one method of hard reset without disconnecting batteries. Put the keys in your ignition and turn your ignition on and off consecutively after a second in each step.

What does it mean when your check engine light comes on?

If the thermostat is stuck closed, your engine can easily overheat. It’s when the temperature gauge spikes into the red zone that the Check Gauges light comes on, or an Engine Hot warning displays. You’ll need to replace the thermostat. If the engine has overheated, the head gasket and more might need to be replaced.

Why is my Check Engine light on in my Bugatti Chiron?

The monstrous Bugatti Chiron has 16. No matter how many you have though, a malfunctioning coil will almost certainly trigger the check engine light, but remember, if your car burns diesel, you have neither ignition coils nor spark plugs.

Can a loose fuel cap cause a check engine light to come on?

Yes, even a loose fuel cap can cause the Check Engine light to come on. The fuel cap does more than just prevent fuel from spilling out. It seals the filler neck, allowing the fuel system to become pressurized.

What should I do if my check engine light comes on?

Luckily, with the Check Engine Light on, the computer will be able to tell you which system is having a problem. The next thing to do is to have the vehicle scanned for diagnostic troubleshooting codes. This can be done for free at most automotive part supply stores.

The monstrous Bugatti Chiron has 16. No matter how many you have though, a malfunctioning coil will almost certainly trigger the check engine light, but remember, if your car burns diesel, you have neither ignition coils nor spark plugs.

Can a low coolant light cause a check engine error?

The PCM and Low Coolant Low coolant in the radiator of your car can trigger the malfunction illumination light (MIL), also known as the “check engine” light. Low coolant can affect the internal temperature of the engine, which is protected by the antifreeze.

His reader indicated it was a thermostat problem. I just want to know why the check engine light came back on after the thermostat was already replaced. If the check engine light is coming on and a code like P1217 is in the computer then the computer is seeing an overheat conditions from the coolant sensor telling it your engine is overheating.

When does the check coolant light illuminate?

In many cases, when the ECT sensor fails, the “check coolant” light will illuminate–if applicable to the specific vehicle–in addition to the MIL. Jody L. Campbell spent over 15 years as both a manager and an under-car specialist in the automotive repair industry.

Is it illegal to reset a check engine light?

Reputable auto shops will not reset a check engine light if the problem is not fixed. To do so would be illegal. This would only be acceptable if it is cleared to complete a diagnostic process to identify a problem. Check engine light being on is a sign that there is a problem with the car.

How can I tell if my thermostat is at fault?

You would first test that the thermostat is indeed at fault by monitoring a warm up cycle of the engine. If it is, then I’d recommend replacing the thermostat. After replacing the thermostat, record your engines warm up cycle and compare it to before the repair to confirm your issue was resolved.

What does the Check Engine light tell you?

Check Engine light revealed thermostat problem thermostat… A Check Engine light system check revealed a possible thermostat problem. Sounds like you have a code P0128. The computer monitors the warm up cycle of your engine — it looks for your coolant temperature to rise to a certain level within a given time frame.

What to do if your engine thermostat is not working?

Either of these options lead to the engine not reaching the desired temperature level. You would first test that the thermostat is indeed at fault by monitoring a warm up cycle of the engine. If it is, then I’d recommend replacing the thermostat.

Would a bad thermostat cause check engine light to come on?

When your thermostat does not respond properly to the temperature conditions in your cooling system, you can have a problem. The most noticeable issues occur when the thermostat gets stuck in either the open or closed position. A malfunction can result in a trouble code , generated by the engine’s computer, which can turn on your check engine light. Aug 12 2019

Where can you get check engine light read?

Where to Get Your Check Engine Light Diagnosed. You have a few options to get your check engine light diagnosed. You can take it to the dealer or an auto mechanic shop, to an auto parts store like AutoZone, or you can check it yourself with a scan tool. Dealer or auto mechanic shop.

How to read a check engine light code?

How to Read Codes From Your Check Engine Light (For Older Cars) Step 1: Find Your Vehicle’s Diagnostic Plug . The first step is to find your vehicles diagnostic plug. The one in my car was a small blue plug that was Step 2: Bridge the Wires. Step 3: Watch the Flashing Light and Decipher the Code.

Can there be codes without check engine light on?

There are other cases where there’s no check engine light but codes. For example, any problem that affects the emissions system will automatically light the check engine light. But if the problem is not emissions related, and also not critical, it may be stored in the computer but not light the check engine light.

How can I tell if my thermostat is bad?

Engine light came on. Checked with OBD and stated bad thermostat. Check engine light on , dealer told us that the diagnostic code indicates that it is the thermostat , they want 436.00 to remove and replace, I questioned the price and they told me that that is the package.

When does the Check Engine light reset itself?

Reset onboard diagnostic computer. If you are sure that you have fixed the problem that the Check Engine light was showing up for, the engine light will reset itself after 10-20 successful cycles. A cycle is when the car is cold and started until it’s at operating temperature.

How much does it cost to replace a jeep thermostat?

The average cost for a Jeep Grand Cherokee Thermostat Replacement is between $134 -$154. Learn More Replaced 2011 jeep grand cherokee laredo 3.6 engine with a new thermostat and now wondering how many miles to drive to get the ‘check engine light off?” Its time to get inspection and it still won’t pass until I drive so many miles.

Engine light came on. Checked with OBD and stated bad thermostat. Check engine light on , dealer told us that the diagnostic code indicates that it is the thermostat , they want 436.00 to remove and replace, I questioned the price and they told me that that is the package.

The average cost for a Jeep Grand Cherokee Thermostat Replacement is between $134 -$154. Learn More Replaced 2011 jeep grand cherokee laredo 3.6 engine with a new thermostat and now wondering how many miles to drive to get the ‘check engine light off?” Its time to get inspection and it still won’t pass until I drive so many miles.

What’s the code on the Check Engine light?

Check Engine light revealed thermostat problem chevrolet A Check Engine light system check revealed a possible thermostat problem. Sounds like you have a code P0128. The computer monitors the warm up cycle of your engine — it looks for your coolant temperature to rise to a certain level within a given time frame.

Why do I get a code on my thermostat?

Now the code gets recorded because sometimes the thermostat has become stuck open or it leaks when closed. Either of these options lead to the engine not reaching the desired temperature level.

Check Engine light revealed thermostat problem chevrolet A Check Engine light system check revealed a possible thermostat problem. Sounds like you have a code P0128. The computer monitors the warm up cycle of your engine — it looks for your coolant temperature to rise to a certain level within a given time frame.

Now the code gets recorded because sometimes the thermostat has become stuck open or it leaks when closed. Either of these options lead to the engine not reaching the desired temperature level.

How can I test my car thermostat?

You can test the thermostat yourself by placing it in boiling water and ensuring it is opening up at the correct temperature.

Is the thermostat on my new car overheating?

I got a new radiator, which stopped the leaking, but the car was still overheating so then we tried replacing the thermostat but it is overheating even now. I spent my entire check on getting those things fixed, what now? I just got paid again but don’t have much to spare towards getting it fixed, so I need to make it count.

How can I check the temperature of my engine?

The system should be checked with an infrared temperature probe to see if the temperature of the engine is close to that the computer is seeing from the coolant sensor. If the coolant temperature sensor input to the computer is within about ten degrees of what the infrared tested is reading on the outside of the sensor then this would be okay.

Is the thermostat failing or sensor or other?

But, the temp gauge shows cold and the engine didn’t seem terribly hot. Oh, and the fan is kicking on which it rarely does otherwise. Which do I believe?

How does the thermostat work in a car?

The thermostat is sort of electrically operated. It functions like a conventional thermostat where it opens at temp, but it also has a heater that heats the wax ring to open it at lower temps if commanded to by the ECM Click to expand… Thanks for the new info!

How old is the sensor on my Dorman thermostat?

It must be electronic somehow. In addition, I can see that the Dorman thermostat housing/thermostat I installed came with a new temp sensor already installed in the housing. So, it is only 2 weeks old. It does look like to me that the wiring for the radiator sensor goes over to where the fan wiring goes.

I got a new radiator, which stopped the leaking, but the car was still overheating so then we tried replacing the thermostat but it is overheating even now. I spent my entire check on getting those things fixed, what now? I just got paid again but don’t have much to spare towards getting it fixed, so I need to make it count.

Engine/Check Engine Warning Light. What it means: The Engine/ Check engine light means that there is a problem with your engine. This light appears when there is a trouble code stored in your engine control unit. You can find this sign in a lot of different shapes like “Check Engine” and other informational texts.

What are the signs on the dashboard of a car?

This list covers general symbols that appear in the most common car models. 1. Engine/Check Engine Warning Light 2. Service Engine Soon Warning Light 3. Battery / Alternator Charging Warning Sign 4. ABS / Brake Control Warning Light 5. Airbag/SRS Warning Dashboard Light 6. Washer Fluid Level Warning Sign 7.

Is there a way to turn off the Check Engine light?

Do I need a special tool to turn off my check engine light? Yes. If you want to turn off your check engine light yourself, then you will need an OBD code reader. It plugs into the diagnostic port commonly located under the dashboard in cars made in 1996 or after.

When does the Check Engine light come on?

It’s when the temperature gauge spikes into the red zone that the Check Gauges light comes on, or an Engine Hot warning displays. You’ll need to replace the thermostat. If the engine has overheated, the head gasket and more might need to be replaced.

How does the thermostat in a car work?

Your thermostat keeps the car’s coolant at the temperature that’s optimal for your engine. The thermostat helps your engine warm up quickly on a cold morning and helps prevent overheating. The thermostat in your car is a valve that controls the flow of coolant between the engine and the radiator.

What should I do if my car dashboard light is not working?

How to solve it: Start by checking all the fluids in the engine bay. Check the oil level, transmission fluid level, brake fluid level, washer level, etc. You should always check that all your lights on the vehicle are working properly. If everything is ok, you should check when the latest service was done and if it’s time for a new service.

Is there a way to reset the Check Engine light?

Using a scan tool is the easiest way for check engine light reset. If you wonder to know how to turn off check engine light by this way, here are 3 steps for you. Connecting the scan tool to the OBD- II ( On- board diagnostic connector) under your steering column.

What causes the Check Engine light to turn off?

The error codes should be deleted which will cause the engine light to turn off. (Note: this method may not word on all car computers). In case, the car battery is disconnected and the light comes right back on, this may show an active problem and should be addressed and fixed.

What’s the best way to reset a car battery?

If you want to reset the electrical components in your car, you can first turn off the ignition and then disconnect the battery cables. A pair of pliers or a wrench is useful for this. There is often some charge left in the battery electrical system, and you can drain this power by pressing the car horn for 30 seconds.

If you want to reset the check engine light with an OBD2 scanner, you can follow this guide: How to reset check engine light. For the check engine light to reset itself, you do need to repair the problem and not expect it to just disappear without doing anything about it.

Either of these options lead to the engine not reaching the desired temperature level. You would first test that the thermostat is indeed at fault by monitoring a warm up cycle of the engine. If it is, then I’d recommend replacing the thermostat.

The thermostat is a component that blocks the flow of coolant to the radiator until the engine has warmed up. When the engine is cold, no coolant flows through the engine.

What to do if your check engine light is still on?

If the check engine light is still on after three days, your problem may not have been fixed or you may need to try some of the methods below to reset it. 2. Turn the Car on and off Three Times Some vehicles will automatically reset the trouble codes that caused the initial error after the vehicle is turned on and off three times in succession.

How to get rid of the ” Check Engine ” light axleaddict?

If it does not go off, then your engine has a problem. 1. Drive car and let light go off by itself. 2. Turn engine on and off three times in a row. 3. Disconnect and reconnet the battery. 4. Use an OBD code reader. 1. Drive Your Car and Let the Light Go off by Itself

The system should be checked with an infrared temperature probe to see if the temperature of the engine is close to that the computer is seeing from the coolant sensor. If the coolant temperature sensor input to the computer is within about ten degrees of what the infrared tested is reading on the outside of the sensor then this would be okay.

What happens when your car thermostat is stuck?

When your thermostat does not respond properly to the temperature conditions in your cooling system, you can have a problem. The most noticeable issues occur when the thermostat gets stuck in either the open or closed position. A malfunction can result in a trouble code, generated by the engine’s computer, which can turn on your check engine light.

What causes the Check Engine light to come on?

When your engine light comes on because of a weakness or failure in this system, you most likely won’t notice the car driving any differently. Everything will seem fine, except for the glowing check engine light on the dashboard. Missing or loose fuel cap. Incorrect fuel cap used. Evaporative (evap) emission canister or fuel tank leaks.

What are the codes for check engine lights?

Emissions Codes P0420 and P0430: Catalytic Converters. “Check Engine Light” Codes P0420 and P0430. Replacing a catalytic converter or “cat” has become a big expensive drain on a lot of people’s budgets these days.

Can a check engine light indicate an EVAP leak?

A check engine light can indicate many different problems with your vehicle, ranging from severe failures to minor fixes. And like other engine problems, an EVAP leak can set off your check engine light and send you into a frenzy trying to diagnose the problem.

When your thermostat does not respond properly to the temperature conditions in your cooling system, you can have a problem. The most noticeable issues occur when the thermostat gets stuck in either the open or closed position. A malfunction can result in a trouble code, generated by the engine’s computer, which can turn on your check engine light.

What to do if your check engine light is on?

Depending on the type of code set, the Check Engine light might turn itself off after a few drives. The system performs a self-test, and if it passes enough tests, it’ll turn the light off itself. Disconnect the Battery. In some cases, you can clear your car warning lights yourself simply by disconnecting the battery for 10 to 15 minutes.