Superchips Flashcal Jeep Wrangler JL 3.6L/ 2.0L Turbo 2018-2021



  • Speedometer Recalibration
  • TPMS On/Off Options
  • Adjust Idle For Winching
  • Internet Updateable
MSRP $299.00
You save 10%

Superchips Flashcal for 2018, 2019, 2020 and 2021 Jeep JL Wranglers with 3.6L or 2.0L Turbo Engines.

If you're looking to truly customize your 2018-2021 3.6L or 2.0L JL Wrangler's setup, then you'll need to be able to control all of it via one simple, easy-to-use system, like this Superchips Flashcal (3571-JL)! 

Features and Benefits:
- Corrects speedometer for tire upgrades between 26"- 40"
- Speedometer recalibration for gear/axle swaps up to 5.38
- Transfer case gear low: 2.72-5.00
- Sway bar disconnect in 2HI (up to 25 MPH)
- Daytime running light options including dropout on/off and location (high beam, low beam, turn signal, fog lights, European/fender lights)
- TPMS on/pff (requires separate download)
- Reads and clears diagnostic trouble codes
- Digital battery voltage display
- Real-time data logging
- Real-time data monitoring
- Device features easy-to-read color screen
- Superchips includes detailed instructions and necessary cords
- Unit easily updates via internet connection for future changes/options

Superchips understands that you've probably installed a number of different aftermarket parts or completed a ton of customized modifications on your new JL Wrangler, so you'll need an easy and efficient way to control those and ensure everything is running efficiently. That's where this Flashcal from Superchips comes into play! You'll be able to correct your Jeep's speedometer if you've upgraded to bigger tires or swapped the axle or removed the sway bar. You'll have a ton of options when it comes to your vehicle's daytime running lights and you'll be able to control the TPMS (with a separate download) depending on when you need or don't need the system.  

Vehicle Fitment:
- 2018-2021 Jeep JL Wrangler with 3.6L or 2.0L V6 Turbo Engine

Please Note: Results and features may vary based on vehicle model and aftermarket upgrades installed onto your Jeep. Please read all instructions before installation and/or operation of this Flashcal.

Vehicle Fitment Note: 
- This tuner has not been tested or validated on right-hand drive Jeep applications or imported (non-American VIN based) Jeep applications. They are not supported by this product at this time.
- The Superchips Flashcal does not currently support Jeeps equipped with the 3.0L V6 EcoDiesel.

California Residents: Proposition 65 Warning

Installation Videos

Video Transcript

We're going to unlock our JL with the help from Super Chips.

If you're looking to unlock all the capabilities of your JL Wrangler's computer system today, we're going to be installing this super chips flash cal fitting your 2018 jeep wrangler JL, equipped with a three point six liter engine. This super chips, flash cal is packed with a ton of features to completely redesign the way your computer reads out. It's going to allow you to correct the speedometer for a tire size from 26 to 40 inches, and it's going to allow you to recalibrate your speedometer for gears up to a 5:38 ratio. You can edit your transfer case low gear, give a sway bar disconnecting too high, and change a ton of other features. Now we're going to get it installed on our 2018 JL Wrangler and see what we can do with it.

Now normally you could just plug your tuner right into the vehicle. However, with the new JL you have to plug in the included bypass module, and that's up underneath the dash. We're going to show you guys how to do it. We're at the driver's side of our Jeep Wrangler, this is the inside kick panel, and then the OBD2 port is right here. If you look right up here, these are going to be the two clips that you have to disconnect and put into your bypass module. As you can see, we've got both portions of this connection out. Now we're going to plug these into our bypass module. I'm going to start with a smaller one and put it into the smaller side of our bypass module like so, with the clipping towards the top and you'll hear it click in. We'll take this other one, same thing, clip at the top and try and tuck it in between a few wires or something like that. Make sure it doesn't hang up anywhere. Now we can plug our tuner in. Plug your tuner into the OBD2 connection, and you'll see it start to turn on.

Now we've got a few options here. We can go through the options to change any of the parameters that we can on here. Go through to use a scan tool, this is going to read any check engine lights and also clear them. Also, there's an information to read what kind of vehicle it's linked to as well as some information about this system. Now the main use of this to me at least, is this option setting. Now we're going to press okay and we're going to turn the ignition on as it directs us to. Make sure not to start the vehicle. Just turn it on to the on position. Then press okay when it's done. Here's the list of all the parameters that you could modify with this Super Chips flash cal. You can change the engine idle rpm, the tire size, gear ratio, transfer case low ratio, your tire pressure, you can even turn the TPMS sensors to the off road mode, which disables them from flashing on your dash.

It's got Your running lights, running lights with a turn signal, your lane change. Let's see, lamp delay, and there's actually a second page, so let's see what's on there. As you can see, there's even more. So you've got the accessory delay lamp, flash the auto park, off road pages, parking assist, and return it to stock. So the first thing that we're going to do is change the tire size. We have a set of 35's on here, so we're going to go in here and correct the speedometer. We'll hit okay. As you can see, it gives you this little section here which is very big, it's really nice and easy to see. That's our factory size, 30.75. Since we have a 35 inch tire and it measures true to a 35 inch tire, we're going to change this up so it reads 35.00. We're going to press okay to save. As you can see, it's adjusting the speedometer, Jeep's going through a few processes right now. We'll turn the ignition off as it directs us to. Press okay.

It's going to take a little bit since this is the first time we're using it, however it gets much quicker after you've used it. Now we can turn the ignition back on. Once again, don't start the vehicle and we'll press okay. So you want to clear the DTC's this is going to be your engine codes. It's going to make sure that all of those are clear, that way it properly shuts off. As you can see, we're back here to the main options page. That tire size change when great, super easy to do. Now you can see this top one, the engine idle. That one's pretty cool.

This is for off roading, it says vehicle must be running to set the idle speed and then you can go in here and actually change your idle speed. So now if you're running a winch or something like that and you want your alternator to kick out some more power to your battery, you can adjust this. I'll press okay, and it says it won't be able to save since the Jeep isn't running, we're inside right now, but that's a pretty cool feature. Now as you can see, there's a lot more options. There's a running light option here, which I think is kind of neat. If you click on it, this is going to allow you to change what turns on with your running lights. You can do a high beam, low beam, your turn signal light, fog lights, or a European light if you have an overseas model and no running light. So we'll go back.

This lane change option allows you to turn your turn signal stalk down once without fully depressing it, and it'll go three times, meaning that you're going to change lane. You can turn that off and on. There's a lamp delay here, so leave your headlights on a few seconds after you turn off the vehicle. Accessory delay, once again, that's going to keep your radio on longer as well as the other lights and switches that you have inside the vehicle. Now the lamp flash and the horn chirp, those are going to be when you lock the vehicle. You can have a lamp flash or a chirp and you can turn both of them off when you lock your Jeep if you have power windows and locks.

The auto park setting, it's going to be for those of you that have the advanced models and are looking to disable some of the features. Now on the back of some of the taillights on the JL, there are some sensors that allow some lane shift and other detection things. This is going to turn that off, meaning you won't have to worry about any of that anymore. Off road pages that'll turn those on or off. Parking assist you can also turn that off just by going in and clicking off, but enough about this. So let's exit out of this and we're actually gonna go into the scan tool. Now this will allow you to scan your engine to get any check engine lights off of it. But another cool thing is it'll actually let you see some gauges.

You can go in here, it's going to gather some information for you and it's gonna allow you to select up to eight points of interest and this is going to show you the gauge outputs for all those. So we're gonna press okay. And as you can see, there's a lot of different options here. We're going to go through and pick a couple and then I'll show you what they look like. Go into the engine miscellaneous ... you know what I'd like to see engine RPM so let's make that one, we'll go back. Fuel trim, let's check that out. So I'll make the fuel pressure one go back time and distance. Vehicle speed, it'd be nice to know. So we'll make that one of them.

O2 sensors, not really worried about. Fuel level, sure let's try that. And do the barometric pressure. The EGR evap system. Maybe we'll do the evap system pressure just to see what that looks like. Into our catalyst temporary, we can see our cats temp both the first and the second one. We'll check one of those off too. Throttle detail.

Throttle position, accelerator pedal position we'll try one of those too. Okay now, wall view engage, it says press okay to start data logging. Now you can actually data log here and then save it, upload it to your computer, see if your Jeep's running alright. Then press okay again to stop it. So let's press okay to confirm. Load the gauges up and we'll get our Jeep turned on. As you can see, it's already showing that barometric pressure, got the evap pressure here, accelerator throttle as well as the cat temperature. It's at 98.6. So it might be reading off of me because that's a perfect human temperature there. Fuel pressure is at 55 PSI. Now let's turn on our Jeep and watch the RPM and not the speed right now, but see if these things change and show you how they work. As you can see, the RPM is going up. See the catalyst temperature's gone instantly up, fuel pressure staying a little constant, give it a little gas see what happens.

RPM's going up, cat temp, and you can see the percentage of the throttles going up as well. So obviously no speed. We're sitting inside. This is a really cool feature of this system. Alright, well that wraps up the installation of this Super Chip flash cal onto our 2018 JL Wrangler. Now, as you guys saw, this is a really nice tuner that allows you to change a lot of parameters on your jeep wrangler. It also has a feature so you can see some of the gauges and view them in live time, which I think that's a really cool feature of this tuner. Now you can find this tune as well as many other great parts for your brand new JL Wrangler right here at

Vehicle Fitment

This product will fit the following Wrangler years:

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