P500 circuit A fault code

So I replaced the front right and the back 2 hubs and the abs light is still on and hasn't reset. TCM isn't working and also my Cruise control doesn't work. Any help would be greatly appreciated. Code500 circuit A

 

Were you replacing hubs only to chase an abs light? Pls provide a backstory for context.

P0500

A P0500 “Vehicle Speed Sensor (VSS) Malfunction.”

This code is triggered when the vehicle's Powertrain Control Module (PCM) or Engine Control Module (ECM) detects inaccurate speed readings or lack of a signal from the Vehicle Speed Sensor (VSS).

The VSS is often attached to the output shaft of the transmission and tells the car's computer how fast the part of the transmission that is driving the wheels is spinning. This is directly related to the speed of the vehicle.

The ABS system has a sensor at each wheel.
Most systems take an individual speed reading by monitoring how fast each half axle os rotating.

Two comparisons are made

1) ABS sensor determined speed versus VSS speed
2) constant checks between all of the ABS sensors to see if any one wheel is spinning at a very different to speed than the others.

It sounds like your issue is that your VSS sensor signal it's not reaching the ECM. Could be sensor or wiring issue. Either way, the VSS signal is not getting there.

Therefore when the ABS system goes to compare the VSS to the speed of each wheel, it's probably comparing each wheel speed to zero or something else that's bogus. So it throws an ABS light.

Some vehicles have the ABS sensor such that it is embedded in the hub assembly and you have to replace the entire hub to replace that sensor. Are you positive that the hubs you are using ABS hubs.

I believe, in the absence of any other information, that the issue may just be related to the VSS. Again that's in the absence of any other information.

 

Well yes I was chasing the abs light by replacing the rear hubs , 178,000 Miles I t can't hurt. (Yes they are ABS hubs that have the built in sensors) so it only makes sense it would be the VSS. Now to find the location (I believe if I remember it's on the rear of the transmission visible from looking down inside the engine bay). But don't quote me. Well I'm going to order the sensor in hopes that's the fix. I appreciate you helping immensely. I'll come back with an update.

 

Don't thank me until it's fixed. Seriously. I'm an S car guy, famous among the regulars on saturnforum.com for getting 75% of the ion questions I try to answer wrong.

 

Not that it makes sense for you to buy one necessarily, but a full-fledged scanner, not reader, gives you access to additional types of diagnostic codes, including ABS codes, airbag system codes, body control module codes. Things you don't know you have cuz they don't light up the service engine soon light. You don't have to spend a ton of money to get the basic information from the scanner. I mentioned this because with a scanner, it very likely would have told you which wheel had the ABS issue.

Also, sometimes the sensor itself or the tone ring on the axle collect a bunch of dirt or metallic particles from driving around and they interfere with the ABS sensor. It can't determine how fast the axle is rotating so it throws an error.