ABS, Traction Control light ON

[Kavish Bhekharee]

Hello all,

I have U0125-00 Lost connection with Dynamics sensor, U1003-88 - ESP CAN C bus performance - bus off, C0037 - Vacuum Pump - General Electronic Failure.

What could be causing all this?

Thanks for you help!

[John/Horace]

Welcome to the site. The most common cause of these codes is a bad abs sensor on one of the four wheels, but it also normally has a specific abs code. Not all cheap code readers will pick up abs codes.

There can be lots of issues on 10 yr old vehicles in the rust belt areas. Anything from a weak older battery (5yrs plus) to rodents chewing on wire harness or main electrical grounds not making good continuity (all grounds on front strut towers need to be cleaned and left with fine film of dielectric grease, bare metal exposed and also light film.
 

Some people add higher gauge ground wires for a long term permanent fix. Search on site has info on how, Dean H has great posts about this. A good two way scan tool is best way to fix mystery electrical issues. After grounds, battery etc have been eliminated first.

[John/Horace]

Google says code c0037 is not vacuum pump but abs wheel speed sensor. 
 

That code indicates a problem with the rear left speed signal. It may suggest that the sensor has failed, which is likely, but it could also mean that the tone ring is obstructed by debris or that the wiring is damaged.

 

You can buy the wire harness with built in coil for $40 ish and not change bearing. But internal sensor ring in bearing might be problem. Bearing is a wear item, often get noisy by 100-150k miles anyway. New bearing assembly usually comes with the new abs wire harness.

Edited June 5, 2025 by John/Horace

[Kavish Bhekharee]

So, it looks like it fixed itself. I removed the ABS connector, applied some dielectric grease on the ABS module pins, put the connector back. I also unplugged the dynamic sensor applied some dielectric grease to the pins. Next thing you know ABS, Traction Control light, check engine light all turned off. Vehicle drive properly now. Im able to use cruise control. Before i wasn't.

[John/Horace]

Check engine light often disables cruise with any kind of code stored. 
 

Resetting pin connections is a good starting point. If it’s intermittent…chance it comes back. 

[Kavish Bhekharee]

Only the traction control comes back once in a while on rainy days but it goes away once i shut off the vehicle and restart it after 5 minutes.

[John/Horace]

How many miles on vehicle.  The left rear abs sensor is the code. A new bearing assembly comes included with a new wire harness.

Can change harness by itself, could be electrical plug or coil sensor on the end going bad. Not expensive part.

If the internal abs pickup inside bearing is bad, new cable won’t help.

 

https://www.rockauto.com/en/catalog/dodge,2014,journey,3.6l+v6,3300354,brake+&+wheel+hub,abs+wheel+speed+sensor,1912
 

 

 

[Kavish Bhekharee]

Hello all,

I found a similar post on diag.net. However, i cannot access any of the replies to that post. If anyone here has a pro account. Could anyone here please please help me get the replies to this post? I would really appreciate it. Below is the link of the post:

https://diag.net/msg/m78pkg01yfnjhj2esejqye06a4

Thanks!