Have you noticed a message on the cluster that says “Stop/Start Not Ready Cabin Cooling Or Heating”? If that’s correct, you are in the right place because, in this article, there will be a lot to cover on this problem.
So, what could be causing this issue in your Jeep? This issue was created because the heating or cooling is in progress and the required temperature for the Stop/Start system was not reached. This system is constantly monitoring these temperatures and when they reach the recommended levels, the system will activate.
That’s why you need to do thorough research on a particular problem that happens to appear in your Jeep. For simple problems such as this, you can end up ripped off by some greedy mechanics. And in the end, the problem will not be solved. And that’s why we are here to help you out.
First, we will learn more about the Stop/Start system and how it works. Then, we are going to learn more about the problem with the message “Stop/Start Not Ready Cabin Cooling Or Heating” and the possible causes.
Lastly, we are going to learn how to troubleshoot the issues. So, without further ado, let’s dive into the article.
What Is A Stop/Start System?
Now before we dive into more complex topics and start elaborating on the problem with the cooling or heating, let’s first learn more about what is the Stop/Start system.
We feel obliged to cover the basics because there are Jeep owners who are not entirely familiar with this system and its method of operation.
The Stop/Start system is not something new. This system debuted more than 20 years ago and we can say that it is finally breaking the mainstream with more and more vehicles adopting it, including Jeep vehicles like the Wrangler and Gladiator.
Nevertheless, this system does two things. The first thing is, improving the fuel economy, while the second is reducing pollution.
As you probably know, this Stop/Start feature will definitely save you a lot of fuel in the long run because this system shuts off the engine while you are waiting at a stop light for example.
The system is smart enough to recognize that the vehicle is not put into use and is stopped. Consequently, this action will turn off the engine.
During the whole year, you can save many gallons of fuel if you are using this system. But how does this system work under the skin? Let’s elaborate more on that in the following chapter.
How Does The Stop/Start System Work?
Now let’s learn more about how this Stop/Start system operates. Once we understand this, we will be able to further understand more about the start stop technology problems.
This system is not very complex. What it does is simply cut off the fuel and spark that is created in the engine while the car is not moving. This will turn off the engine.
Then, once you put your foot on the accelerator, this system will turn on the engine and you will be able to accelerate.
But for it to work correctly, there are a lot of factors that need to be aligned, such as the temperature of the engine, as well as the cabin temperature.
So, the computer constantly evaluates data that is sent to it from different sensors that are located in the vehicle.
If some of the conditions are not met, the system will be inactive or “Not Ready”, like in our case with the message that says “Stop/Start Not Ready Cabin Cooling Or Heating”. But more on the specific problem, we are going to elaborate on in the next chapter.
What Does This Message Mean?
Now let’s elaborate more on the problem itself and see more about the circumstances when you get this message.
The message “Stop/Start Not Ready Cabin Cooling Or Heating” appears to notify you that your Stop/Start system is not ready. This means that the system is not active at the moment because some conditions for its work are not met.
The important thing is that you should not panic because this doesn’t necessarily mean you have a problem.
There could be some other things behind this message. In the following chapters, we are going to elaborate on each of these possibilities in detail. And learn more about what could be causing this.
Stop/Start Not Ready Cabin Cooling Or Heating: 8 Possible Reasons
Now let’s list all the possible reasons behind this message. In other words, let’s find out what could be the possible cause for this message on your cluster.
First, we are going to start with the most probable and then we will move on to the least probable options.
So, let’s get started.
1. Cabin Temperature Not Reached
The first cause for this problem is the case when the cabin temperature that was set has not been reached.
This is the most common cause for this issue and often can annoy a lot of people on a day-to-day basis.
This is the case because the cabin temperature can be out of range for the Start/Stop system. This means that the temperature in the cabin is really hot or really cold and is not up to the factory-recommended level for the Stop/Start to work properly.
The system will start working when the cabin temperature reaches normal levels. A normal level can be any temperature that is in the normal range. Not too cold and not too hot.
Just tweak the A/C temperature until the Stop/Start system is happy and does not show this message.
2. Climate Control Is Set On Full Defrost
Another situation when you can get this message is the situation when the A/C is set to defrost.
Defrost mode as you probably know is the situation when the blower is turned up to the max.
In this situation, the Stop/Start system will not be active and you will have to turn off this defrost mode and the system will start working normally once again.
3. Max A/C Is Enabled
Another situation where you can get this problem is the situation when you have selected the max A/C setting. So, what is the difference between Max A/C and standard A/C?
The difference is that when you use the standard A/C there is air that comes from the outside into the cabin.
When you are using Max A/C the air is recirculated inside the cabin. In other words, the A/C is recirculating the same air that is already in the cabin.
In this case, you should turn off the Max A/C and turn on the standard A/C setting.
4. Cabin Climate Control Requires Service
A broken climate control system can also cause these problems. And when it comes to climate control, there can be a lot of things that can go wrong.
Especially if the A/C motor fails, if there are leaks, or if the cabin filter is clogged. In this case, the A/C will not work at all.
So, only fixing the issue with the A/C will solve the problem with the message.
5. Bad Battery
Another very common cause for issues such as this is the car battery. The car battery is the 12V auxiliary battery.
This battery is constantly supplying your vehicle with electrical current. Dozens of systems depend on this battery, especially the Stop/Start system.
This system is most dependent on the battery because it needs a good supply of electrical current to work.
This is why we often advise that you check the battery voltage and see if the voltage is good. If the voltage is below 12.6 volts while the engine is not running. It could be a bad battery or possibly problems with the alternator.
6. Broken Sensors
Broken sensors can also cause problems such as this. The Stop/Start system depends on a lot of different sensors and if these sensors give the system bad data, it could create error messages like in our case.
And in this situation, we are talking about the cabin temperature sensor. There is a special sensor for the cabin air temperature. If this sensor is broken, a problem like this will likely appear.
So, make sure that you diagnose the issue with an OBD2 scanner and see if there are any codes concerning this system.
7. Bad ECU/PCM
A bad ECU/PCM can also cause strange problems such as this in our case. Here we are talking about the car computer.
Some people call it ECU, some people call it PCM, it is the same thing.
In some cases, this computer can fail and cause strange messages to appear such as this.
8. Software Glitch
Last but not least is the software glitch, Jeep is using software that is quite known for its ability to create bugs and there can be instances when you get a message such as this.
A simple software update at the dealership will sort this problem out on your Jeep if the software is the problem.
Fixing Jeep Stop/Start Function for Cabin Cooling Or Heating
Now let’s learn more about what you can do to solve this problem with the Stop/Start system not being ready.
The first thing you can do is to Jeep auto Start/Stop disable. In other words, disable your Stop/Start system and turn it back on, this solves the problem in many instances.
If you still get the message, you might want to play with the cabin temperatures and find the sweet spot that this system will work on.
If this doesn’t help, make sure that the defrost mode is off, as well as the Max A/C is off.
The next thing you want to check is the car battery, replace the battery if this component is not working well.
Or else, the problem lies somewhere in the sensors, ECU, or software. And for this, you might want to check the nearest dealership.
What Is the Cost of Fixing the Issue?
The cost to fix this problem can depend on the cause. It can cost you $0 in many cases. But it can also cost you a few hundred dollars if there is some problem with certain sensors or the PCM of your Jeep.
What Does Cabin Cooling and Heating Mean?
Cabin cooling and heating refers to the process of regulating the temperature inside a cabin or enclosed space to provide comfort to the occupants.
It involves using cooling systems, such as air conditioning, to lower the temperature during hot weather and heating systems, such as heaters, to increase the temperature during cold weather.
The message Stop Start Unavailable on your Jeep typically means that the automatic stop-start feature is not currently functioning or available.
What Does Start-Stop Ready Mean?
The term Start-Stop Ready refers to a feature found in some vehicles with automatic engine control systems.
It indicates that the engine is designed to automatically stop running when the vehicle is stationary, such as at traffic lights or during idle periods, and then restarts quickly when the driver is ready to accelerate again.
This feature helps to improve fuel efficiency and reduce emissions.
Conclusion
In this article, we covered quite a bit when it comes to the problem with the message Stop/Start Not Ready Cabin Cooling Or Heating.
First, we elaborated more on the Stop/Start system and learned how this system works.
But what could be causing this problem?
Well, most often the cause is a cabin temperature that is out of the recommended range. This is often caused by a lousy cabin temperature sensor, or indeed the temperature is significantly off from the recommended levels.
