PDA

View Full Version : ABS and Traction control lights on



dcaprio
10-29-2019, 11:19 AM
2017 JKUR Recon. I have the ABS and ESP lights on. Took to several places and they were unable to pull any codes. One shop used a snap on scanner and still nothing. They performed a battery test and it checked out fine. A short while later lights go out. Now several days later lights on again. Stopped at Autozone. They pulled the following codes:
C2100. Battery Voltage Low
C1027. Left rear wheel speed sensor signal erratic performance
C1020. Left rear wheel speed sensor circuit
C2102 Battery voltage low

Is this simply a left rear wheel speed sensor or do I have other issues? There is not the usual U code for the wheel speed sensor.

Thanks in advance for any advice!

wjtstudios
10-29-2019, 11:26 AM
Sounds like itís the rear sensor. Before you replace it, try disconnecting it and clean the plug. They catch a lot of dirt and grime and degrade the signal. Get it back on tight and see if that solves it. If not, replace it.


2015 JKUR AEV JK350
1985 CJ8 Scrambler

Coop
10-29-2019, 07:42 PM
Sounds like itís the rear sensor. Before you replace it, try disconnecting it and clean the plug. They catch a lot of dirt and grime and degrade the signal. Get it back on tight and see if that solves it. If not, replace it.


2015 JKUR AEV JK350
1985 CJ8 Scrambler

Good suggestion. Iíve noticed when the sensors go bad they do not leave a code, just the ABS and traction control lights.


Sent from my iPhone using Tapatalk Pro

wjtstudios
10-29-2019, 07:58 PM
Good suggestion. Iíve noticed when the sensors go bad they do not leave a code, just the ABS and traction control lights.


Sent from my iPhone using Tapatalk Pro

Itís a start before buying a new sensor. Probably still a bad sensor though


2015 JKUR AEV JK350
1985 CJ8 Scrambler

jorgelrod
10-29-2019, 08:09 PM
Sounds like itís the rear sensor. Before you replace it, try disconnecting it and clean the plug. They catch a lot of dirt and grime and degrade the signal. Get it back on tight and see if that solves it. If not, replace it.


2015 JKUR AEV JK350
1985 CJ8 Scrambler

99.999999% this is your issue. This is one of the most common JK issues out there.

Coop
10-29-2019, 10:03 PM
Just do one at a time and check. A hundred yards is all thatís necessary to know.
Last time my Jeep suffered this issue it turned out to be a front sensor. The fronts use a magnetic sensor. The front one that went bad had lost its magnetism. Knew it as soon as I pulled it.
The rears are Hall effect, not magnetic.


Sent from my iPhone using Tapatalk Pro

19YJ94
10-30-2019, 01:13 AM
Yeah I had to change both rear sensors.
And we know which fuse to pull to get by also when the sensor throws a fit and locks up the rear brakes. 😉

nbunga
10-30-2019, 01:32 AM
Yeah I had to change both rear sensors.
And we know which fuse to pull to get by also when the sensor throws a fit and locks up the rear brakes. [emoji6]

Do you remember which one it was, I donít [emoji3]

Ddays
10-30-2019, 01:52 AM
Do you remember which one it was, I donít [emoji3]

I know which wire to cut to kill the whole damn system (thanks to Bill's assist :D)

Forgot how fun doing doughnuts was thanks to modern vehicle nanny systems. Not anymore!

wjtstudios
10-30-2019, 01:55 AM
Do you remember which one it was, I donít [emoji3]


I know which wire to cut to kill the whole damn system (thanks to Bill's assist :D)

Forgot how fun doing doughnuts was thanks to modern vehicle nanny systems. Not anymore!

That little switch is priceless


2015 JKUR AEV JK350
1985 CJ8 Scrambler

jdofmemi
10-30-2019, 02:34 AM
I know which wire to cut to kill the whole damn system (thanks to Bill's assist :D)

Forgot how fun doing doughnuts was thanks to modern vehicle nanny systems. Not anymore!

I need to do that too.

The other thing is I want the locker to work whenever I want it.
It makes drifting and doughnuts better😁😁

dcaprio
10-30-2019, 02:50 AM
Update: I replaced the left rear wheel speed sensor. It was rather cold here in Colorado today and I ended up breaking the damn clip on the connector. I was pretty pissed. And the lights and codes didnít go away. Turned out it was a blessing in disguise. I went to Advance Auto Parts and picked up a new connector to splice In. It was then that I noticed one of the wires to the sensor was abraded and shorting. I spliced in the new connector,eliminating the abraded section. Put everything back together. Drove down the driveway about 50 ft and all the lights went out. I read codes and all were gone. Took the Jeep for a ride in the snow, ABS and traction control worked and no lingering lights or codes. Success! Thank you all for your advice! This is a great forum community!


Sent from my iPhone using WAYALIFE mobile app (http://r.tapatalk.com/byo?rid=73415)

19YJ94
10-30-2019, 04:42 AM
Glad to hear you got it fixed. 👍

wjtstudios
10-30-2019, 10:41 AM
Thatís great, glad it worked out


2015 JKUR AEV JK350
1985 CJ8 Scrambler