Low Voltage Issue on the 2.0L - Turbo Boost Lag

[DexterJeeper]

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
JeepCares

Hi Darlene,

Thanks for the response. Do you have the ability to speak with an engineer to confirm?

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[JeepCares]

Hi Darlene,

Thanks for the response. Do you have the ability to speak with an engineer to confirm?

Unfortunately, we are unable to do that. We recommend working with your dealer, and while in service, we can escalate a case to a Jeep Wave Specialist.

Darlene
JeepCares

 

[Sunshne×Whsky]

Any updates or fixes on this? My wife will be at the dealer today to have an unrelated issue fixed. She is going to ask about the TSB and see if they will perform it or not. I haven't had this issue, but would like to prevent it from happening.

 

[silas3d]

Thanks for the link to the TFL video - that is almost exactly what we experienced, but we were a good ways up Red Cone Pass, not Mt. Evans. I took ours in to the dealer a few weeks ago and they ended up performing what appears to be the same software updates on mine. It's been working fine since the updates, but I haven't had a chance to take it off-road again yet.

The exact diagnosis for mine was: "INSPECTED AND FOUND NO DTC'S PRESENT. MULTIPLE MODULE UPDATES AVAILABLE FOR VARIOUS FAULTS. UPDATED PCM TO LATEST SOFTWARE LEVEL PER BULLETIN 1803719 REV. A. UPDATED BPCM TO LATEST SOFTWARE LEVEL PER BULLETIN 0803219. TEST DROVE VEHICLE AND VERIFIED ALL OPERATING AS DESIGNED AT THIS TIME."

It'll be interesting to see how this pans out. In the interim I picked up a portable jump start battery to take the next time we go off-roading. Assuming the wife and kids want to come with me again!

p.s. @JeepCares did contact me and followed up after the fact. Thanks! They recommended that I have the dealer perform a test of the 48V system under load to verify that it was operating correctly as well. I haven't had time to do that yet...

 

[CrazyMonkey4]

Thanks for the link to the TFL video - that is almost exactly what we experienced, but we were a good ways up Red Cone Pass, not Mt. Evans. I took ours in to the dealer a few weeks ago and they ended up performing what appears to be the same software updates on mine. It's been working fine since the updates, but I haven't had a chance to take it off-road again yet.

The exact diagnosis for mine was: "INSPECTED AND FOUND NO DTC'S PRESENT. MULTIPLE MODULE UPDATES AVAILABLE FOR VARIOUS FAULTS. UPDATED PCM TO LATEST SOFTWARE LEVEL PER BULLETIN 1803719 REV. A. UPDATED BPCM TO LATEST SOFTWARE LEVEL PER BULLETIN 0803219. TEST DROVE VEHICLE AND VERIFIED ALL OPERATING AS DESIGNED AT THIS TIME."

It'll be interesting to see how this pans out. In the interim I picked up a portable jump start battery to take the next time we go off-roading. Assuming the wife and kids want to come with me again!

p.s. @JeepCares did contact me and followed up after the fact. Thanks! They recommended that I have the dealer perform a test of the 48V system under load to verify that it was operating correctly as well. I haven't had time to do that yet...

Darn, for some reason my dealer didn't do the PCM update you got. Wonder why that's the case. I havent had a chance to test the jeep off road yet either, so I'm unsure if my issue is resolved.

I had my battery tested before I got the software updates, dealer didn't find any issues there. To me it seems the issue is isolated to software

Do you guys think portable battery jumper will be able to jump the car when it's dead under these conditions? I got a portable jumper as well and I'm really hoping it does the trick if I have any issues in the middle of no where.

 

[18JLRubi]

Same here...... https://www.jlwranglerforums.com/forum/threads/electrical-issues-first-time-off-road.32873/

 

[H-Poverty]

@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.

I apologize for the delayed response. I dont get on the forums much other than for research.

My issues has not been resolved although it has been patched for months at a time with part replacements.

I have had the same stalling & charging issues multiple time (7-10 trails) over the past 8 months and I loose all throttle response when this happens. The issue is intermittent but only happens when offroading/rock crawling for prolonged periods of time (4+ hours) at constant low rates of speed(under 10 mph). Soon as I get the Jeep back to the highway it operates as designed, or so it seems.

I have had batteries replaced (both 12v once & 48V PPU 3 separate time) the MGU replaced, and High voltage cables once. FCA/dealer is willing to replace parts but will not admit to this being a known issue. To say this is frustrating is and understatement. I have supplied FCA with videos of the issue actively happening as well as provided the engineers with documents of this happenings on their field recoding device. I dont know what else I can do to help them get this resolved.
As of last week I was denied a buyback on the Jeep by FCA (Jeep is 13 months old 14k miles). We love our Jeep but we purchased it for an offroading vehicle, this issue preventing us from using the Jeep for what it was *designed for and is risking the safety of our family.

Have you had any luck fixing your issue?

 

[Tdkrum5]

Looking at picking up a new JL. Seems this is still a problem and maybe I should look for the 3.6.

 

[AnnDee4444]

Looking at picking up a new JL. Seems this is still a problem and maybe I should look for the 3.6.

This is actually a problem with BSG/eTorque. You can get both a 2.0 & 3.6 with & without eTorque depending on the model/year you choose.

 

[Engmoreau]

I apologize for the delayed response. I dont get on the forums much other than for research.

My issues has not been resolved although it has been patched for months at a time with part replacements.

I have had the same stalling & charging issues multiple time (7-10 trails) over the past 8 months and I loose all throttle response when this happens. The issue is intermittent but only happens when offroading/rock crawling for prolonged periods of time (4+ hours) at constant low rates of speed(under 10 mph). Soon as I get the Jeep back to the highway it operates as designed, or so it seems.

I have had batteries replaced (both 12v once & 48V PPU 3 separate time) the MGU replaced, and High voltage cables once. FCA/dealer is willing to replace parts but will not admit to this being a known issue. To say this is frustrating is and understatement. I have supplied FCA with videos of the issue actively happening as well as provided the engineers with documents of this happenings on their field recoding device. I dont know what else I can do to help them get this resolved.
As of last week I was denied a buyback on the Jeep by FCA (Jeep is 13 months old 14k miles). We love our Jeep but we purchased it for an offroading vehicle, this issue preventing us from using the Jeep for what it was *designed for and is risking the safety of our family.

Have you had any luck fixing your issue?

There is a post talking about loosing throttle response. Happened to be a black box behind the pedal. Maybe is not the batteries

 

[JLU138]

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?

I just found this thread, but I have been having the same issue for a year since I bought my 2019. JLU running 37 inch tires and the 2.0 engine. It’s only an issue when I’m rock crawling. Sometimes it happens three hours in, sometimes it happens three minutes in. Same deal, on an incline or obstacle suddenly everything sputters and the engine dies and when I turn the engine back on it’s charging below 12 V. If I don’t turn it off and let it sit for a little while it will just continually drop as low as 8 V . At that point the check engine light finally turns on, but by the time I get it on the highway and drive it back to the dealer it corrects itself and the light goes off and if I don’t bring it in immediately there’s no code for them to read. Last year I got so frustrated after bringing it in time and time again,with everyone just shrugging their shoulders that I just kept driving it with the intention to really break it. Last year it happened immediately into a trail I’ve been wanting to do forever(Mount Holy Cross) but I just kept driving it and finally got to the point where it would not even start again without a jump. Luckily I was on a trail with somebody but they had to jump me every quarter mile. The entire electrical system got fried and I went without a navigation/radio screen for six months before they could get me another one. Once I got back onto the highway of course the stupid check engine light went off as if there was never an issue. But this time I messed up the electric system so bad they had to do something. They ended up replacing the entire hybrid battery system. I did not have a chance to try it out again for the rest of the winter but lo and behold same issue this year.

Note: I was deflating my 37’s to 12 psi or so. After the first couple failures this year I started to deflate to only 20psi. This seems to have helped significantly.
The engine still does the same thing with the voltage but it’s less severe and if I just turn the engine off for a minute it will recharge quickly.
Questions for the forum: did you ever get this issue resolved? Also, anybody with more mechanical experience than me, would a more powerful aftermarket alternator help the situation do you think?

 

[AnnDee4444]

I just found this thread, but I have been having the same issue for a year since I bought my 2019. JLU running 37 inch tires and the 2.0 engine. It’s only an issue when I’m rock crawling. Sometimes it happens three hours in, sometimes it happens three minutes in. Same deal, on an incline or obstacle suddenly everything sputters and the engine dies and when I turn the engine back on it’s charging below 12 V. If I don’t turn it off and let it sit for a little while it will just continually drop as low as 8 V . At that point the check engine light finally turns on, but by the time I get it on the highway and drive it back to the dealer it corrects itself and the light goes off and if I don’t bring it in immediately there’s no code for them to read. Last year I got so frustrated after bringing it in time and time again,with everyone just shrugging their shoulders that I just kept driving it with the intention to really break it. Last year it happened immediately into a trail I’ve been wanting to do forever(Mount Holy Cross) but I just kept driving it and finally got to the point where it would not even start again without a jump. Luckily I was on a trail with somebody but they had to jump me every quarter mile. The entire electrical system got fried and I went without a navigation/radio screen for six months before they could get me another one. Once I got back onto the highway of course the stupid check engine light went off as if there was never an issue. But this time I messed up the electric system so bad they had to do something. They ended up replacing the entire hybrid battery system. I did not have a chance to try it out again for the rest of the winter but lo and behold same issue this year.

Note: I was deflating my 37’s to 12 psi or so. After the first couple failures this year I started to deflate to only 20psi. This seems to have helped significantly.
The engine still does the same thing with the voltage but it’s less severe and if I just turn the engine off for a minute it will recharge quickly.
Questions for the forum: did you ever get this issue resolved? Also, anybody with more mechanical experience than me, would a more powerful aftermarket alternator help the situation do you think?

Hopefully someone will figure out an ESS conversion some day.

 

[JLU138]

Hopefully someone will figure out an ESS conversion some day.

Hopefully someone will figure out an ESS conversion some day.

Hopefully someone will figure out an ESS conversion some day.

Yeah, hopefully. But by then I will probably be in a new Ford Bronco at this rate.

 

[Windshieldfarmer]

I have the etorque 2.0....went to CO...did about 6 hours of pretty intense crawling, slow, steep, and some technical. No problems. My altitude was between 9,000 and 11,000 feet. Is there a correlation to altitude? Really strange problem...and apparently fairly rare. Buyback time.

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