Traction Control Engaging Over Bumps

[jhelton001]

I'm having a traction control issue that I hope someone might be able to point me in the best direction. Vehicle is a 2004 Discovery with 149,000 miles. No codes in vehicle and drives normal until you go over a railroad crossing or similar type bump then the traction control light will come on and you can feel vehicle will apply braking to one wheel and pull to one side until you lift off throttle. This condition only happens on throttle over bumps and I have felt it pull from the left front, right front, & right rear but so far never the left rear. My scan tool can only communicate briefly with ABS module and driving straight all wheels are within .5 to .8 front to rear but I do not have a scanner that will keep communication to duplicate condition. Any help would truly be appreciated

Jon

 

[discostew]

I'm having a traction control issue that I hope someone might be able to point me in the best direction. Vehicle is a 2004 Discovery with 149,000 miles. No codes in vehicle and drives normal until you go over a railroad crossing or similar type bump then the traction control light will come on and you can feel vehicle will apply braking to one wheel and pull to one side until you lift off throttle. This condition only happens on throttle over bumps and I have felt it pull from the left front, right front, & right rear but so far never the left rear. My scan tool can only communicate briefly with ABS module and driving straight all wheels are within .5 to .8 front to rear but I do not have a scanner that will keep communication to duplicate condition. Any help would truly be appreciated

Jon

It sounds like you have a wheel speed sensor signal falling out or maybe a hub getting loose. Your best hope is that abs has some intermittent code stored for 1 of the wheels. Most generic scan tools wont be fast enough to see the signal fall out. You might have to measure sensor output with a meter at the slabs ecu and hope you see one of the sensors acting up

 

[jhelton001]

Just as a follow up the issue has been resolved. After 2 sets of aftermarket rear hubs and switching switching rear sensors back and forth to stock I have fixed issue with a set of known good factory rear hubs. I can not say for for sure what about the aftermarket hub (internally) is the issue but vehicle is 100% fixed with factory hubs.

 

[coors66]

Just as a follow up the issue has been resolved. After 2 sets of aftermarket rear hubs and switching switching rear sensors back and forth to stock I have fixed issue with a set of known good factory rear hubs. I can not say for for sure what about the aftermarket hub (internally) is the issue but vehicle is 100% fixed with factory hubs.

Glad you got it sorted. I'm in a similar boat. Name and vendor where you purchased the aftermarket hubs?

I recently replaced my rear hub with an "aftermarket" (Britpart) and have intermittent Amigos popping up. They clear and won't appear for a week or so later. I damn certain it's the hub.