Volvo TCS kicks on all of the time

Cattleman84 · Jul 19, 2019

Snailexpress said: ↑

And what is the code??????????????????????
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I believe he is saying that he is NOT getting the malfunction indicator light (light continuously on)... But is instead getting the actively operating indicator light (light flashes)... Therefore the system thinks it is working properly and is not throwing a code...

Something is telling the truck that it has sensed wheel spin when there is no wheel spin... So tcs system engages and somehow the computer thinks he should be going slow to control the traction... Obviously at least one bad sensor.

Snailexpress · Jul 19, 2019

If TCS light is flashes it means TCS turned off manually. Probably it was some previous owner modification or bad wiring. For any malfunction ie wheel sensor or air pressure sensor or actuator circuit ABS module will set permanent ABS/ TCS light on and you can pull the actual active code under menu DIAGNOSTIC /View active faults/ Brake ECU
If malfunction is going away module will turn light off after condition fixed and vehicle speed is 15 mph or more.
I assume PO has done wheels bearing check on the regular basis to save tires. Or I'm wrong?

Koren · Jul 20, 2019

Johny41 said: ↑

If your axle broke , you are lucky to be ok, be careful could have hurt yourself and people around you. This is the risk of driving old high mileage truck, I had tcs fault few years ago on my last truck well over million miles, took it in a good shop, they inspected measures the axle, and found bearing excessive movement spinning and chewing axle spindle . Soo, they couldn't tighten the bearing and ordered these new axle housings new bearings, but was more expensive solution .You can call axle surgeons to inspect it, or similar axle repair services and weld new spindles if needed perhaps new bearings,it cost about 4-5000$ for all 4 drive axle spindles. I wouldn't drive it like this , don't ignore tcs faults , can indicate one wheel is spinning at a rate it shouldn't, yes most of the time are glitches bad abs sensor wires but can signal loose bearing or something more sinister and dangerous at the end of the axle/hub.
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I had leak in one of the wheels seals, they replaced all 6 of them, had to change bearings in driver side steer and passenger front drive. Inspected all of them, the rest looked fine. New gear oil in differentials, no metal shavings.
I assume it is some type of sensors. Will take it to the shop to check out.

Koren · Jul 20, 2019

Cattleman84 said: ↑

I believe he is saying that he is NOT getting the malfunction indicator light (light continuously on)... But is instead getting the actively operating indicator light (light flashes)... Therefore the system thinks it is working properly and is not throwing a code...

Something is telling the truck that it has sensed wheel spin when there is no wheel spin... So tcs system engages and somehow the computer thinks he should be going slow to control the traction... Obviously at least one bad sensor.
Click to expand...

Thank you!)))

Koren · Jul 20, 2019

Snailexpress said: ↑

If TCS light is flashes it means TCS turned off manually. Probably it was some previous owner modification or bad wiring. For any malfunction ie wheel sensor or air pressure sensor or actuator circuit ABS module will set permanent ABS/ TCS light on and you can pull the actual active code under menu DIAGNOSTIC /View active faults/ Brake ECU
If malfunction is going away module will turn light off after condition fixed and vehicle speed is 15 mph or more.
I assume PO has done wheels bearing check on the regular basis to save tires. Or I'm wrong?
Click to expand...

Not sure about PO but I asked the shop to check all bearings and replace all of the wheel seals.

Mookie123 · Feb 19, 2022

mover man said: ↑

Had that problem on last Volvo. I turned out to be a combo of bad wiring (chaffed wire grounding out ) and the big sensor on front of truck in middle of bumper.
Last time it happened I was also loaded and had to deliver. Called my Volvo at home. They said disconnect speed sensor from side of tranny. That took care of problem of driving.
So went and made del, put truck in shop where they replaced that sensor on front bumper and found the wiring.
Click to expand...

Mookie123 · Feb 19, 2022

What year is your truck? I have 2016 and trying to find that sensor.. thanks

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