Many Jeep Compass owners find the Start Stop system more annoying than helpful. While the feature is designed to save fuel by shutting off the engine at stops, it can cause uncomfortable pauses, make the air conditioning less effective, and even lead to battery wear over time. If you drive a 2018 Jeep Compass and want to disable Start Stop, you’re not alone. Let’s explore why this happens, methods to turn it off, and what you should know before making any changes.
Why Does Start Stop Exist?
Start Stop is all about fuel efficiency and reducing emissions. When you stop at a light, the system turns off the engine to save gas. When you lift your foot from the brake, the engine starts again. According to the EPA, Start Stop can improve city fuel economy by 3% to 10%. However, many drivers dislike the hesitation and change in feel.
Can You Permanently Disable Start Stop On A 2018 Jeep Compass?
Jeep did not include a built-in option to permanently turn off Start Stop. The 2018 Compass resets its Start Stop status every time you start the car. Even if you press the dashboard button to turn it off, it returns the next time you drive.
Some car brands let you turn off Start Stop through the infotainment system or by holding the physical button. The 2018 Compass does not.
Owners must look for other solutions if they want the system gone for good.
Temporary Ways To Disable Start Stop
If you want to turn off Start Stop for a single drive, Jeep gives you a simple way:
- Start your Compass.
- Find the A OFF button near your gear selector.
- Press it once. The Start Stop light on the dashboard should show “off.”
This method only works for your current trip. Once you turn off the car, you’ll have to do it again next time.
When Does Start Stop Not Activate?
There are moments when the Compass disables Start Stop on its own:
- The engine is not yet at optimal temperature.
- The battery charge is low.
- Climate control demands high power (for example, max AC).
- The hood is open.
- The seatbelt is not fastened.
Understanding these situations can help you avoid Start Stop without pressing any buttons.
Permanent Methods To Disable Start Stop
Many drivers want a permanent solution. Here are the most common options, along with a side-by-side comparison to help you decide.
1. Start Stop Eliminator Device
This is a plug-and-play electronic device. It remembers your last Start Stop setting.
If you turn it off once, it stays off until you turn it back on.
Pros:
- Easy to install
- No permanent changes to your car
- Can be removed
Cons:
- Costs around $100–$150
- May void part of your warranty
2. Battery Sensor Disconnect
The Start Stop system checks your battery status before shutting off the engine. If the car thinks the battery is weak, it disables Start Stop. Some people disconnect or fool the sensor.
Pros:
- Low cost
- Simple workaround
Cons:
- May cause warning lights
- Can affect other electrical systems
3. Dealer Reflash/software Update
Some Jeep dealers or third-party shops can “reflash” your vehicle’s computer. This disables Start Stop completely.
Pros:
- Permanent solution
- No physical device needed
Cons:
- Expensive ($200–$300)
- May void your warranty
- Not reversible without dealer visit
Here’s a quick comparison of these methods:
| Method | Cost | Warranty Impact | Difficulty |
|---|---|---|---|
| Start Stop Eliminator | $100–$150 | Possible | Easy |
| Battery Sensor Disconnect | Low | Possible | Easy |
| Dealer Reflash | $200–$300 | Likely | Hard |
Step-by-step: Installing A Start Stop Eliminator
For most owners, the Start Stop Eliminator is the safest and most popular choice. Here’s how you can install it yourself:
- Buy a device made for your 2018 Jeep Compass.
- Locate the OBD-II port under the dashboard (left of the steering wheel).
- Plug in the device. You don’t need tools or to cut any wires.
- Start your vehicle. The device will automatically remember your Start Stop preference.
If you ever want to remove it, just unplug the device.
Real-world Experience
Many Compass owners share that after disabling Start Stop, their driving is smoother and they don’t worry about the AC pausing at red lights. However, some notice a small decrease in city fuel economy usually less than 1 mpg.
It’s also worth noting that Jeep’s warranty policy might be affected by these changes. While most dealers don’t check for plug-and-play devices, a computer reflash is more likely to void parts of your warranty.
What To Watch Out For
Two things beginners often miss:
- Insurance and Legal Issues: Tampering with emissions systems can be illegal in some states. If you’re leasing your Jeep, ask your dealer before making changes.
- Battery Health: The Start Stop system uses a special battery. Disabling the system doesn’t remove the need for that type of battery. Avoid switching to a standard battery or you may face electrical problems.
Here’s how disabling Start Stop might affect your Jeep:
| Feature | With Start Stop | After Disabling |
|---|---|---|
| Fuel Savings (city) | +3% to +10% | 0% |
| Engine Wear | Reduced at idle | Normal |
| Battery Life | Shorter | Longer |
Final Thoughts
Disabling the Start Stop feature on your 2018 Jeep Compass is possible. For most, a Start Stop Eliminator offers the best balance of ease, cost, and reversibility.
Always consider your warranty, local laws, and personal needs before making a change.
If you’re unsure, talk to a trusted mechanic or Jeep specialist.
If you want more technical details, you can learn about Start Stop technology at the Wikipedia Start-Stop System page.
Frequently Asked Questions
Does Disabling Start Stop Affect My Jeep’s Warranty?
Yes, it can. Plug-in devices are less likely to void your warranty, but dealer software changes might. Always ask your dealer before making changes.
Will I Lose Fuel Economy If I Turn Off Start Stop?
You may see a small drop in city mileage, usually less than 1 mpg. Highway mileage is not affected.
Can I Use A Regular Battery If I Disable Start Stop?
No. The Compass uses a special battery for all its systems.
Using a standard battery can cause electrical problems.
Is It Legal To Disable Start Stop?
Laws vary by state. In some areas, changing emissions features is not allowed. Always check local rules before making modifications.
Will My Ac Or Heater Work Better If I Turn Off Start Stop?
Yes, your air conditioning and heater will stay on without interruption at stoplights, as the engine will not shut off.
