TCS light on — air switch bad?

Sensor labeled DT1 is one you need I believe.
How to check procedure and wiring diagram is in PDF I gave link to, page 37. Don't forget to calibrate sensors after repair.

 

Hello everyone!
I'm in need of help in regards the TCS and ABS ( on the truck), please.
The codes that I got on the computer are in the Brake ECU tab:

MID 136 SID 89 FMI 2
MID 136 SID 4 FMI 14

My unit it's a 2012 Volvo vnl 670 ,Cummins isx ,13 speed.
Vin CN 553443
So the TCS light in the cluster it's solid ON, the switch on the dashboard it doesn't do anything if turned on/off.
It started to be like this ,ON ,since I tried to enter the shop where the ground level was different, so I switched ON the front axle switch in order to move .Since then the TCS stayed on. While trying to switch it off from the button controler it doesn't do anything.
I also checked if there's any oil leak from the seals on both drive axles, there's nothing.
I greatly appreciate your time and expertise into all your answers posted above. Hope you can help me.

Thanks allot !

 

I have the exact issue, did you get it fixed?

 

With last 6 of the VIN it’s easy to figure out which is which. Do you know the last 6?

 

MID 136(ABS) SID 89 FMI 2 for steering angle sensor, data erratic, intermittent or incorrect. Need to have dealer check calibration of sensor with wheels straight Likely the sensor needs Re-calibrated.

MID 136 SID 4 FMI 14 for ABS wheel speed sensor axle 2 right. Could be the sensor, bad tone ring, both, or issue with that circuit.