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Hey, I know it's a pretty old post, but I got a C0050 5A error code, I have checked everything and everything looks ok, including the rear right abs sensor, but how can I check the "wheel encoder ring" ? And how can I identify it, What does it look like?
could be the magnetic ring on the back of the hub- gets brittle and you can loose a piece of it, very common on caddy`s. I just did two hub bearings for this problem. you may have to pull the hub to see it
here s look
could be the magnetic ring on the back of the hub- gets brittle and you can loose a piece of it, very common on caddy`s. I just did two hub bearings for this problem. you may have to pull the hub to see it
here s look https://www.youtube.com/watch?v=8CRX...MichaelBorders
Thanks ! I'll check, this ring is replaceable ? Or in case it's damaged I need to replace the whole hub?
Whole hub as far as I know, I couldn't find just the plastic rings- the hubs I changed were good beyond the abs light they were triggering
Thanks , I've taken a look right now from under the car, observing the ring, it looks a bit different, the ring is not plastic , it is made of metal and looks completely fine, maybe something is damaged under this metal ring. To be honest the car had an accident on this side and the whole knuckle was replaced earlier , but so far half a year everything was fine until I drove a bumpy road, after a couple of bumps ..... boom this error appeared.
Did you rotate the wheel and look t every tooth. On one model car I used to work on the ring was steel on a steel hub. Rust built between the two until the ring cracked between two teeth. So that one gap was maybe .030" wider than all the others and would set a MIL.
Did you rotate the wheel and look t every tooth. On one model car I used to work on the ring was steel on a steel hub. Rust built between the two until the ring cracked between two teeth. So that one gap was maybe .030" wider than all the others and would set a MIL.
Hey, I know it's a pretty old post, but I got a C0050 5A error code, I have checked everything and everything looks ok, including the rear right abs sensor, but how can I check the "wheel encoder ring" ? And how can I identify it, What does it look like?
Here is what the FSM indicates should be checked when trying to analyze C0050 5A DTC:
Although not mentioned in the diagnostic procedure one thing I would check is the runout in the rear wheel bearing. With the old sealed hubs that had the ABS sensor built into the hub loose wheel bearings could cause the ABS light to come on. With the sensor now being plugged into the hub the distance between the sensor and the tone ring is still small. Put the car up in the air, release the parking brake and with your hands at the 12 and 6 positions rock the wheel up and down to see if you get any movement.
If a wheel bearing isn't causing the issue it may well be dirt/corrosion. My Tahoe has pluggable sensors and dirt/corrosion build up around the spot where the sensor plugs into the knuckle cause problems for me about every two years.
I have seen tone rings go bad on vehicles that have lots of use on salty roads. A Chrysler minivan that a neighbor had had the tone ring corrode away until there wasn't enough left to trigger the sensor.
Here is what the FSM indicates should be checked when trying to analyze C0050 5A DTC:
Although not mentioned in the diagnostic procedure one thing I would check is the runout in the rear wheel bearing. With the old sealed hubs that had the ABS sensor built into the hub loose wheel bearings could cause the ABS light to come on. With the sensor now being plugged into the hub the distance between the sensor and the tone ring is still small. Put the car up in the air, release the parking brake and with your hands at the 12 and 6 positions rock the wheel up and down to see if you get any movement.
If a wheel bearing isn't causing the issue it may well be dirt/corrosion. My Tahoe has pluggable sensors and dirt/corrosion build up around the spot where the sensor plugs into the knuckle cause problems for me about every two years.
I have seen tone rings go bad on vehicles that have lots of use on salty roads. A Chrysler minivan that a neighbor had had the tone ring corrode away until there wasn't enough left to trigger the sensor.
Bill
Thanks Bill! Yeap, thats exactly what happened, I have removed the hub and found it to be corroded with a lot of dirt, cleaned it and on the way replaced abs sensor. Everything works as expected now
