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Low Voltage Issue on the 2.0L - Turbo Boost Lag

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Prowlers

Prowlers

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I want to know what accessories you guys are running and what other conditions were at play? I wheeled at altitude over 7500 in 4low for several hours this weekend and never did the voltage drop below 13.9 - there has to be a logical explanation for these issues. Especially the fact that something is draining down your batteries.

Also, are you running 38's there? You re-gear at all?
One more clue. SO in 4L the ASS-Auto Stop crap turns off. For some reason I did click the button to turn OFF the ASS while in 4L. About 15 minutes later is when voltage started dropping. I did try turning off the ASS button at the time but nothing helped. Could pressing the ASS in 4L cause a issue? I'll try that.
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DCBlake

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I have a 2019 Rubicon Unlimited with the 2.0L turbo having issues.

1st issue: I was wheeling in Colorado over the weekend and noticed extreme lag in the Turbo, on normal roads in automatic the turbo lags about 2-4 seconds before it kicks in to take off. ()both trips 2nd trip in 3 months to same trail) Back here in Ohio the turbo is instant. Another issue while crawling in 4 low was at a incline I let go of the brake and gave it gas simultaneously to go up an incline and the Jeep rolled backwards with the gas pedal pressed. The Turbo just sputters. I'm losing Turbo power and have to rev the engine out at 2k rpm to gain my turbo boost back. I have to rev out ever 10 feet or so while climbing at about a 7% incline. Running 93 octane in the east and 91 octane in the west. What's the deal with the power loss?


2nd issue: When I was in 4 low crawling the battery voltage went to 12.9 and the LOW VOLTAGE BATTERY light came on. Then the transmission kicked out of M1 gear and made a grinding noise for a second, then I was stuck dead in the trail at 9v 5 miles in. KEEP in mind if your Jeep drops below 12.2Volts you cannot move anywhere! No shift auto or manual nothing. All the lights flash, ABS, Engine light, Battery light......JL had 9153 miles on it at the time. To temporarily resolve the issues had to shut the Jeep off, got a battery jump and after the charge to 13.6v everything was running but at a lower voltage. The only issue now is the voltage normally stays at 14.5v but now ranges up and down between 13-13.4. AND how does the alternator charge without being connected to the belt pulley system? I was clueless on this JL ! Time for a code reader and a repair manual for those deep adventures.

My poor JL goes to the dealer Friday for repairs, but everything works now and the voltage is the only thing low. Does elevation affect the turbo that badly that I can't wheel out west? Or is there programming I can do to improve my turbo boost?

Anyone Else having issues with their New JL?
low-voltage.jpg

JL-down.jpg
Was wheeling today on Tray mountain rd ga. Right in the middle of the technical part of the trail the battery voltage light came on at 13.6 - 13.7 volts. Knowing this seemed to be an issue as I too have the turbo 2.0 I just kept trying to finish trail asap. I was able to get out of the trail but now even after driving it for several miles it kept fluctuating wildly. This should never happen as we buy the jeep to get out there and explore especially with a new vehicle. Now I am thinking I should have gotten the v6. I have now stopped and turned it off waited 10 mins turned it back on and the battery voltage light is still on and it still fluctuates.

Finally made it to the place I was staying popped hood checked to be sure all wires were tight. Since all of that looked good I decided to pull ground cables from battery to force a reset... after doing this Jeep came back online with no issues or warning lights plus voltage seems to be floating as normal... this whole thing is almost like issues when radio locks up and you have to reset...

BTW as an item to note while wheeling I have also had 4lo jump out of gear for no reason at all. Just crawling along and then it just pops out of gear which could have been bad in certain situations
 
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H-Poverty

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I have had the same issue with the Battery but perhaps to a larger degree...
I have a 19 JLUR with 2.0L

I have had two separate occurrences now. Both times I was in 4 low moving at a slow rate of speed (under 5mph) for longer than 30 minutes and the battery voltage slowly drops to well below 12 volts and battery light as well as check engine light come on then the electrical systems start to freak out. (HVAC and Radio turns on and off with out input, transmission goes into auto park, accelerator pedal is unresponsive, service transmission warning on EVIC, engine begins idling rough and shaking, electrical switches are inop, and a bunch of other stuff).
It seems to be a issue with the MGU (Generator) not able to charge the batteries enough at low RPM to keep up with the demands of the vehicle operation. The only way that am able to move the Jeep when this happens is to perform a key cycle, the really strange thing is 80% of the time the Jeep would start even with a voltage reading below 12v... The other 20% of the time in had to jump start the Jeep and sometimes it would go another 100 years and other times it would go another 5 feet before it acted up again. Here's the real kicker after jump starting it cause the battery was DEAD I would drive a couple feet and maybe it would freak out again so I did a key cycle and it turned over with out an issue at all making me even more dumbfounded about the issue.

After the first string of occuranance I disconnected all of my electrical accessories and it did not make a difference but I have left them unhooked since and have still had the issue. We were camping on the trail so I disconnected the battery over night then right before we headed back down the trail I reconnected it and the Jeep turned over and was showing normal voltage 14.2 at initial start the. Slowly dropped down to 13.8 area well not even 20 yards down the trail it freaks out and transmission neutrals on me and it needs jumped...

The second occurrence I was watching the voltage the whole way up the trail and it did fine for about 30 mins or so then I watched it slowly drop .1 volts at a time until it died again. This time I didn't want to chance it and I limped it off the trail. Soon as it was on a normal dirt road at decent speed it operated normal and has ever since.

I have it at the dealership now and they dont have any information about the problem. STAR (Jeeps technical assistance team for the dealership technicians has been less than helpful) However the dealership went the extra mile and reached out to some contacts and it sounds like they are going to put a computer in my Jeep and have me go recreate the issues so the engineers can see exactly what is happening.

Any information that anyone has on this issues would be greatly appreciated so we can get this resolved.

20190721_165907.jpg
 

JeepCares

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I have had the same issue with the Battery but perhaps to a larger degree...
I have a 19 JLUR with 2.0L

I have had two separate occurrences now. Both times I was in 4 low moving at a slow rate of speed (under 5mph) for longer than 30 minutes and the battery voltage slowly drops to well below 12 volts and battery light as well as check engine light come on then the electrical systems start to freak out. (HVAC and Radio turns on and off with out input, transmission goes into auto park, accelerator pedal is unresponsive, service transmission warning on EVIC, engine begins idling rough and shaking, electrical switches are inop, and a bunch of other stuff).
It seems to be a issue with the MGU (Generator) not able to charge the batteries enough at low RPM to keep up with the demands of the vehicle operation. The only way that am able to move the Jeep when this happens is to perform a key cycle, the really strange thing is 80% of the time the Jeep would start even with a voltage reading below 12v... The other 20% of the time in had to jump start the Jeep and sometimes it would go another 100 years and other times it would go another 5 feet before it acted up again. Here's the real kicker after jump starting it cause the battery was DEAD I would drive a couple feet and maybe it would freak out again so I did a key cycle and it turned over with out an issue at all making me even more dumbfounded about the issue.

After the first string of occuranance I disconnected all of my electrical accessories and it did not make a difference but I have left them unhooked since and have still had the issue. We were camping on the trail so I disconnected the battery over night then right before we headed back down the trail I reconnected it and the Jeep turned over and was showing normal voltage 14.2 at initial start the. Slowly dropped down to 13.8 area well not even 20 yards down the trail it freaks out and transmission neutrals on me and it needs jumped...

The second occurrence I was watching the voltage the whole way up the trail and it did fine for about 30 mins or so then I watched it slowly drop .1 volts at a time until it died again. This time I didn't want to chance it and I limped it off the trail. Soon as it was on a normal dirt road at decent speed it operated normal and has ever since.

I have it at the dealership now and they dont have any information about the problem. STAR (Jeeps technical assistance team for the dealership technicians has been less than helpful) However the dealership went the extra mile and reached out to some contacts and it sounds like they are going to put a computer in my Jeep and have me go recreate the issues so the engineers can see exactly what is happening.

Any information that anyone has on this issues would be greatly appreciated so we can get this resolved.

20190721_165907.jpg
Hi H-Poverty,
We're sorry to hear about your experience. Has a case been opened in the Customer Care side to add additional assistance while working with your dealer? If not, please send our team a private message and we would be happy to get this process started for you!
Alex
Jeep Social Care Specialist
 

H-Poverty

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Yes, there is an open case for this issue with Jeep Wave. Thank you for your assistance.
 

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JeepCares

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Yes, there is an open case for this issue with Jeep Wave. Thank you for your assistance.
You're welcome, H-Poverty! If you ever have any trouble getting in contact with your case manager, please let us know!
Alex
Jeep Social Care Specialist
 

CrazyMonkey4

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@H-Poverty have you had any luck resolving your issue? I've had a similar one with my 2019 2.0L JLUR ~7000k miles.

Recently went off-roading in 4L up a steep road in high altitude (8000+ft) and my Wrangler showed a battery warning light some 20mi into the trail. I then noticed the battery voltage was draining to and below 7V. Before the warning light the Wrangler was popping out of gear here and there. I tried to pull over and let the battery charge but had no luck so I went up the mountain looking for shade to let the jeep cool off. As I was going up the last part of the mountain the non-essential electrical components of the Wrangler were starting to shut off.

Once I made it up the mountain I tried to reconnect the sway bar and shift the jeep into park but the jeep instead got stuck out of gear completely (I believe this was due to the lack of power in the battery?). I tried restarting the jeep but only the engine shut off and the electronics stayed on. I wasn't able to restart the engine at this point.

I then used the manual brake override to put it into park, and got a jump and was more or less okay after that.

I just took the JLUR to the dealership and they said they couldn't find any issues.. I'm going to check my fuse box tonight and see if any fuses are loose, seems that's often suggested as a possible issue.

Definitely a bit nervous with taking the Jeep on a trail, having had this issue.
 
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CrazyMonkey4

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I have a 2019 Rubicon Unlimited with the 2.0L turbo having issues.

1st issue: I was wheeling in Colorado over the weekend and noticed extreme lag in the Turbo, on normal roads in automatic the turbo lags about 2-4 seconds before it kicks in to take off. ()both trips 2nd trip in 3 months to same trail) Back here in Ohio the turbo is instant. Another issue while crawling in 4 low was at a incline I let go of the brake and gave it gas simultaneously to go up an incline and the Jeep rolled backwards with the gas pedal pressed. The Turbo just sputters. I'm losing Turbo power and have to rev the engine out at 2k rpm to gain my turbo boost back. I have to rev out ever 10 feet or so while climbing at about a 7% incline. Running 93 octane in the east and 91 octane in the west. What's the deal with the power loss?


2nd issue: When I was in 4 low crawling the battery voltage went to 12.9 and the LOW VOLTAGE BATTERY light came on. Then the transmission kicked out of M1 gear and made a grinding noise for a second, then I was stuck dead in the trail at 9v 5 miles in. KEEP in mind if your Jeep drops below 12.2Volts you cannot move anywhere! No shift auto or manual nothing. All the lights flash, ABS, Engine light, Battery light......JL had 9153 miles on it at the time. To temporarily resolve the issues had to shut the Jeep off, got a battery jump and after the charge to 13.6v everything was running but at a lower voltage. The only issue now is the voltage normally stays at 14.5v but now ranges up and down between 13-13.4. AND how does the alternator charge without being connected to the belt pulley system? I was clueless on this JL ! Time for a code reader and a repair manual for those deep adventures.

My poor JL goes to the dealer Friday for repairs, but everything works now and the voltage is the only thing low. Does elevation affect the turbo that badly that I can't wheel out west? Or is there programming I can do to improve my turbo boost?

Anyone Else having issues with their New JL?
low-voltage.jpg

JL-down.jpg
@Prowlers were you able to find the cause of your battery issue?
 
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silas3d

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Same thing happened to us yesterday! 2019 JLU Rubicon with the 2.0L with 4800 miles on it.

After about 40 minutes in 4L working up Red Cone Pass in Colorado the console lit up with low voltage warnings, the maintenance light came on, the system displayed a message that unessential features were being disabled, the console display switched to a white/blue color scheme with the word "LO" in the top left and right circles where the temp is normally displayed, etc.

We pulled off on a relatively flat spot and shut down for about 20 minutes. When we started it up to head back down (many thanks to our friends who went ahead to let others know we were headed down!) the low voltage warning had gone away, but the MIL light was still on and the console was still showing the white/blue font, etc.

Made it off the trail, parked for a picnic right at the bottom, and when I turned the car back on about an hour+ later all the warnings had cleared including the MIL and the console was back to normal. One other strange thing I noticed was that the front and rear lockers were showing as engaged in the off-road pages display, but I had never used the lockers; so I recycled the app and they showed as unlocked.

Interestingly enough I also had it randomly pop out of 4L into N at one point before the low voltage debacle... Not sure why this happened.

Mine is headed into the dealer this coming Friday so they can try to diagnose what happened. If it really is the BSG not being able to charge the battery after extended driving in 4L it should be pretty easy to replicate by cranking the AC and driving around in 4L while watching the voltage...

I'm hoping this isn't one of the reasons that it's looking like this engine won't be offered on the 2020 Rubicons; or I'm going to have an extraordinarily frank conversation with the dealership!
 

CrazyMonkey4

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I haven't had any luck with finding a solution with FCA/Jeep support yet, does anyone here have anything I could work off of? Any help would be awesome
 

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DexterJeeper

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I haven't had any luck with finding a solution with FCA/Jeep support yet, does anyone here have anything I could work off of? Any help would be awesome
Check out this video just posted by TFL



They had the exact same issue. The only difference is rather than telling them nothing is wrong like my dealership did, their dealership actually did something. They apparently did something to the PCM and the battery pack control module. @JeepCares, can you confirm this will address the low voltage, no charge issue?
 

four low

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The dealer performed two TSBs to correct the stalling/ voltage issues , these TSBs must be available to all dealers, maybe some are lazier than others.
I did notice that the TFL guys are under the misconception that the E Torque is a propulsive electric motor that powers the Jeep at low speeds.
This is incorrect, the E torque is strictly a front mounted belt drive STARTER/Generator than gives 1/2 tire rotation to start up for the ESS. It also optimizes rpms for shifting, but is NOT a form of locomotion...That's the "mild" part of hybrid. I'm looking forward to a plug in, which will run on electric power, but until then, the E Torque is strictly for engine starting, keeping the 48v battery up to power systems when ESS is functioning., and maintaining the 12v battery.
 

CrazyMonkey4

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Thanks @DexterJeeper , that's super helpful. My Jeep support contact actually mentioned one of those TSB's but wanted to have the dealer see some error codes before they made any fixes. However, when I did go to the dealership my error codes had already cleared from the system since it seems those codes only stick around for a couple weeks.

If this were many other issues I wouldn't mind waiting until it happens again but I really don't want to put myself in danger and potentially get stuck in the middle of no where to have the error code thrown again, @JeepCares is there any way you could help me get the two TSB's done (I believe they're just software updates, so nothing major) without having to reproduce the issue again which seems to only happen when the car is under high stress (high altitude, heat, etc). Thanks!
 

DexterJeeper

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Thanks @DexterJeeper , that's super helpful. My Jeep support contact actually mentioned one of those TSB's but wanted to have the dealer see some error codes before they made any fixes. However, when I did go to the dealership my error codes had already cleared from the system since it seems those codes only stick around for a couple weeks.

If this were many other issues I wouldn't mind waiting until it happens again but I really don't want to put myself in danger and potentially get stuck in the middle of no where to have the error code thrown again, @JeepCares is there any way you could help me get the two TSB's done (I believe they're just software updates, so nothing major) without having to reproduce the issue again which seems to only happen when the car is under high stress (high altitude, heat, etc). Thanks!
I couldn't agree with you more. Not a great feeling when it happens in the most precarious places--especially when you have your whole family with you. Hope FCA figures out this issue soon.
 

JeepCares

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Hi @DexterJeeper,

We are not mechanically trained, and therefore we are unable to confirm any vehicle concerns or repair procedures. We recommend speaking with your dealer for a proper diagnosis.

@CrazyMonkey4,

In many circumstances, if there are not stored codes, your dealer will need to duplicate the issue in order to diagnose it. If you would like support while at the dealer, please feel free to send us a private message.

Darlene
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