You could have a marginal battery/charging system or poor power/ground connection causing this. There have also been reports of the ABS control module doing this kind of thing, but the Jeep started OK.

Did you notice if the traction control turned off (indicator illuminated)?

As far as reading the error code, it is an ABS module fault, and not all scanners can read those codes. In most cases, it's a wheel sensor that causes those codes, but the Jeep should have started up regardless.

 

You could have a marginal battery/charging system or poor power/ground connection causing this. There also been reports of the ABS control module doing this kind of thing, but the Jeep started OK.

Did you notice if the traction control turned off (indicator illuminated).

As far as reading the error code, it is an ABS module fault and not all scanners can read those codes.

I'm fairly certain no dash lights were on. Is there a TCS dash light, or are you referring to the light on the button itself? That I'm not sure was on or off.

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I checked the dash lights this morning. No issues with startup and no warning this morning. After startup when all dash lights initially come on, the ABS, TCS, and 1-2 other related lights stay on 1-2 seconds longer than the rest. They did go off and stayed​ off though. Interestingly, the oil and temp (oil? coolant?) lights stay on even longer, probably another 1-2 seconds. Still no messages in the system. Was running late to work, so i didn't try to pull codes. I know for some cars, dash lights will blink a certain amount of times to warn of a potential issue. Does a dash light staying-on-longer-than-others mean anything in mopar world?

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No thats just the boot cycle. A flashing light is a warning, a steady light for longer is status.

You may have just had a glitch. Perhaps there was a glitch in the brake light switch(s). That may cause a service warning and no start (foot must be on brake pedal to start).

That should have set a code, we will be interested in what you read.

 

Just tonight when leaving to drive to my GF's house, i got into my 2015 JGC Overland and pushed start but nothing happened. I tried again, still nothing. That's when i noticed a warning on the cluster saying "Service Electronic Braking System". I tried releasing the parking brake, and it started after that (but sure if it's related or just a coincidence). This is the only find I've had any issues with the car. I bought it a couple months ago, and it's only got 20.5k on it. There are no saved messages in the system and no lights on in the dash. I didn't try to pull codes, because I was in a huge rush. Any idea what this could be?

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Hi rfehr613,

If you decide to visit your local dealership for further diagnosis I'd be happy to offer assistance if needed. Just PM our page with your VIN and let me know!

Andrea
Jeep Social Care Specialist

 

Thank you. At this point, i think I'm going to wait and see if it happens again. Perhaps it was just a fluke. If it occurs again, I'll probably take it in. Also, if it's throwing codes, I'll take it in.

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Just an update: it's not throwing codes, and the problem hasn't occurred again

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2014 Jeep Grand Cherokee

I had the exact same problem with the exact same fix two days ago. Outside air temp ~15F. I released the parking brake and the car started. Today I have the same problem only nothing tried will permit the car to start. I will have to take it in and let everyone know what the problem was.

 

I wonder if releasing the parking brake wiggles a wire to the brake switch (on brake pedal), which causes it to reconnect.

 

I just had this issue with a 2014 GC Overland...any suggestions?

 

I'm having the same issue on my 2014 overland, did you find out what the cause and fix was?Thx.

 

I am encountering a similar issue...Intermittent solid brake light (red "Brake" light) with a cluster message to "Service Electronic Braking System". Tried an Autozone OBDII tool, but unable to read ABS module. No faults in PCM/TCM. Is there a particular tool (other than dealer) to focus in what the issue might be? I suspected a wheel speed sensor, but I would think this would cause an ABS fault, and ABS light on the cluster.

 

I should mention that I do not have any starting issues...All my restarts have cleared the problem, and only returns every now and then but it does seem to be happening more and more frequently.

 

Some of the $60+ ODB scanners can read ABS and airbag faults. Its a relatively common upgrade. The ones autozone and most part stores use to read customer codes usually don't.

That being said, a red warning alerts the driver if the brake fluid level is low or the parking brake is applied. A red warning with an amber warning may indicated a brake distribution fault. So a parking brake not fully released, a bad parking brake switch, low fluid level, bad fluid level sensor could be issues.

 

FWIW i haven't seen that light again since my last post. I wonder if upgrading the Uconnect system had anything to do with it (seems unlikely, but who knows).

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No start on '15 GC Limited with "Service Electronic Brake System" on dash cluster. Cycling parking brake on & off has no effect. Car just will not start. This is the first problem in ~40k miles and I'm wondering if it could be related to last week's tire rotation done at oil change franchise?

 

Try pressing hard on the brake pedal while trying to start. Wiggle the brake pedal to exercise the pedal switch. Otherwise its either try to replace the switch or borrow a scanner that can read ABS and brake system error codes.... as its shooting in the dark.

 

Jump start got it going; ran it to my independent mechanic who reported that it's acting normal and didn't throw any codes to help him out. They kept it overnight to see what would happen in the morning. No word back yet...

 

Almost sounds like it needed to be reset. Perhaps the battery was low, or you have a failing alternator.... or missing/corroded alternator ground strap.

 

Hello. So I've had my 2015 JGC limited for 3 months now. When I got it about a week and a half later it threw a p0456 code at me nothing crazy didn't think anything of it. About a month later I was driving to work and all of a sudden my car jolts forward puts me into neutral and says on the dash "vehicle speed to fast to shift into gear" I try to start it up by pushing the button and it just cranks about 10 times with no start. Try it again. Same thing. Try it a 3rd time. Starts up. About a week later does the same thing. Says the same thing too. But as I go to start it it cranks over about 10 times it says "service electronic braking system" I take it to my dad cause he has a obd reader and it now has p0205 and p0206 codes with a u011 code. Fuel injectors. I do some research find out maybe it's my ecm. Replace my ecm and for about 2 1/2 weeks it's running great I think the problem is solved do a obd read on it and I only have the p0456 code. I'm driving home from work today and boom it dies. "Service electronic braking system" now the codes I have are just p0456 still and the p0205-206. I don't think it could be my ecm because it's less than a month old but at the same time I didn't have the injector codes when I first got it. What do you think it is?

 

There are probably module diagnostic codes an everyday OBD reader can't see that may be helpful to troubleshoot. A standard OBD reader basically reads check engine codes.

P0456 is a small emissions leak, perhaps because the fuel door is not sealing completely. Should not be affecting starting and running.

For P0205 and P0206, The Powertrain Control Module (PCM) monitors the continuity of the injector circuits as well as the voltage spike created by the collapse of the magnetic field in the injector coil. Any condition that reduces the maximum current flow or the magnitude of the voltage spike can cause this DTC to set. Given two cylinders, you may have a poor connection to injector 5 and 6. So check for cable harness damage or connector corrosion. Did you see any corrosion in the PCM connector when you replaced it, or wire damage? Anyway that could be an intermittent issue.

As far as shifting, are you sure you didn't accidentally bump the shift lever or paddle shifters? Are you saying the Jeep also stalled? If so did the dash light up like a Christmas tree? The transmission gear selection is controlled by the PCM, which you replaced. Not sure off hand what would cause a spontaneous downshift or shift to neutral/park unless the shifter is being flakey and sending neutral/park commands. The too fast to shift notice is just a side effect, probably because you were moving too fast to downshift to the next gear or to engage park.


As far as the service electronic brake system, we need the ABS codes for that. It could be as simple as the brake pedal switch. Some OBD readers can read the ABS module.

With all that being said, sometimes low or marginal battery voltage can cause weird things to happen. So check battery and alternator cables for tightness and grounds for good connections. Monitor the voltage displayed in the vehicle info screen. Have the battery checked.

There is a haunted vehicle thread indexed in the maintenance/repair sticky thread that could have other possibilities.

 

I also have a 2015 JCG Overland with 78K miles on it. This just happened over the weekend while out of town.

It had the original 2015 battery in it. I replaced the battery myself hoping that was the issue. That made no difference. The dash displayed the same error "Electronic Brake System Needs Service" before and after replacing the battery.

We had it towed to a dealer at night. The flatbed driver had manually put it in neutral with the switch in the center console arm rest to load it up. They put it back into park the same way after delivering it to the dealer.

The dealer service tech got in it the next morning. It started right up. They drove it with no issues. They plugged it into their computer, scanned it, and could not find any codes. They mentioned one message related to parking brake. It didn't mean anything to them.

Could the parking brake issue clear itself by exercising that manual override to put it into neutral ?