VSC TRAC & VSC OFF lights

[RomanianAdrian]

Once the light comes on, I believe a proper scanner or tech stream can tell you which one it is.

If they're not all the same, does this imply uneven tire wear? Assuming a zero would be a failed sensor, correct?

 

[FamilyCamper]

If they're not all the same, does this imply uneven tire wear? Assuming a zero would be a failed sensor, correct?

View attachment 3814910

Hmmm I'd guess so as well sorry I am not much help past this.

 

[Meatdawg]

My traction control and abs actually did activate on curved freeway offramp prior to these lights turning on recently. Besides inspecting the cables for anything obvious is there any way to check which is faulty -did you just replace them all?

A diagnostic scan told me which one needed replacement.
Hope you get it sorted out.

 

[Malleus]

My traction control and abs actually did activate on curved freeway offramp prior to these lights turning on recently. Besides inspecting the cables for anything obvious is there any way to check which is faulty -did you just replace them all?

What year is your truck and is it a US model or not?

 

[RomanianAdrian]

Mine's a 2003, North America model. I ran across a general Toyota video suggesting there is a general behavior from Toyota ECM to display the VSC and VSC TRAC lights. I happen to also have a p0051 code(upstream O2 sensor, bank 2). I will post back in a few days once I get time to install the new 02 sensor see if the guidance on the below YouTube video link proves true. The gist in the video is basically that the other stored codes besides the c1201 code are the true root cause of the generic c1201 dtc.
Causes and Fixes Toyota C1201 Code: Engine Control System Malfunction

 

[Malleus]

Why would you trust a YouTube video when you could look it up in the Toyota service manual?

 

[RomanianAdrian]

Update after new o2 sensor and 300 miles, no new DTC's. I think for the future when people get these lights you've got to check/resolve all your dtc codes first -the failsafe mode(and accompanied trac lights), C1201 dtc as described in the fsm can be triggered by dozens of other codes. Strange to lose traction control due to so many unrelated DTC's.