TPMS issue; C2124, C0210 DTCs

Hi folks! I've had an intermittent (~ once a month) TPMS light triggering on my 2009 Gen 2 (93K). The light initially blinks, goes solid and stays that way, usually turning off days/a week later. Behavior seems random, although the light often, but not always, comes on at a similar place on my commute. Pressures on all 4 tires are fine with a gauge. I know my TPMS sensor batteries are now older and have read other threads on this.

Using a miniVCI, I previously found a C2124 TPMS DTC, "Cannot Receive a Data from the Transmitter ID4". However, the live data showed all four transmitters sending the correct pressure and temperature information, and all four sensor battery voltages "over". Could the light/code trigger from external signal interference? Or are the battery voltage readings not a reliable gauge of sensor health? I rotated my tires about a month ago (to shift the sensor position relative to the vehicle TPMS transmitter in the rear) but that didn't seem to change things.

Rechecking the vehicle today after another TPMS light, I still see a current C2124 DTC (I did not erase that before so don't know if that is new or old; still indicated sensor ID4 but all sensors are operating and voltages are "over") but also a current C0210 ABS/VSC/TRAC DTC ("Rear Speed Sensor RH Circuit"). There is no warning light for that showing on the dash, but sometimes traction lights flicker after a pothole or bump in the road. Should I be concerned about the C0210 DTC if there is no light on the dash?

BTW, the 12 v aux battery is a little over 4 years old. MFD Signal Check voltages are 12.6v in acc mode; 12.2v with headlights on; 14.1 v in ready. So that seems OK to me.

Thoughts on the TPMS and the C0210 DTC? This forum is such a great source of info. Thanks!

 

I just remembered an incident when we had to hit the brakes really hard a few weeks back to avoid someone who pulled in front of us. I suppose it is possible that event might have set the C0210 DTC.

Also, all four tires are relatively new and matched without uneven wear.

 

Thanks for the reply! Did your bad sensor just stop transmitting when the battery died, or did it show a low voltage (as seen on the miniVCI) and trigger off and on as it was going down?