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this has a brand new LR hub and speed sensor ?
if you cleared the code and the C1234 still comes back and the sensor and hub are brand new make sure the terminals in the sensor connector are clean and tight and none of the female terminals are opened up in the center to cause a bad connection at the sensor electrical connection
if that checks out unplug the LR sensor and ohm out the sensor it should be @ 850 to 1350 OHMS or reading just about the same OHMS as the RR speed sensor
if that checks out then plug everything back in and unplug the ABS module and ohm down the terminals # ***** and # ***** as seen here it should ohm 850 - 1350 OHMS
if it does then the ABS module is bad
if it does NOT ohm out withing spec then one of those 2 wires from terminal # ***** or # ***** are broken or bad from the ABS module to the LR sensor connector
i would clear the code if it comes back then follow what i said to find the problem
ok clear the code if that code resets then follow what i said
yes all those codes will go away one the cat converter is installed as those will all set with a cat converter missing
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