C1231 on Toyota
Toyota skid control (ABS/VSC) fault, tied to the steering angle sensor input
Severity: Inspect soon
Owners with C1231 report the VSC and traction lights on, and Toyota bulletins show it can come with a warning light from repeated ABS and traction events; stability and anti-lock help may be off.
It gets more serious if:
- Stop: Stop and have it checked if the red BRAKE light comes on, the vehicle drifts or stops suddenly, or the pedal feels different.
This page covers only what differs on Toyota. For what C1231 means, the ranked causes and the test order, see the C1231 guide.
What's different on Toyota
ToyotaYour car
2001–2003 · Sequoia
Supported by vehicle dataSequoia owners report C1231 with C1203, C1223 and C1241 and VSC lights. Toyota bulletin 00303 covers a logic change. Only the NHTSA summary was read.
2009–2011 · Camry
Supported by vehicle dataToyota TSB-0086-13 (also filed as T-SB-0086-13) covers a repeated ABS and TRAC light with C1231 on Bosch ABS/VSC, fixed by an ABS ECU logic change. The summary text was read; whether it is current is not verified.
00303Status unverified
VSC light on with C1231
2003sequoia · NHTSA 10005246
A skid control computer logic modification was made to prevent the condition. Summary only.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
TSB-0086-13Status unverified
Warning light on with repeated ABS and TRAC and C1231
2009–2011camry · NHTSA 10053729
The ABS ECU logic was modified to address the condition. Summary only.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Sources and review
- Toyota 00303: VSC light on with C1231 in the skid control computer memory (2003 Sequoia)
- NHTSA complaint ODI 10171069: 2003 Toyota Sequoia C1203 and C1231
- NHTSA complaint ODI 10185717: 2003 Toyota Sequoia C1241, C1231, C1223, C1203
- Toyota TSB-0086-13: warning light on from repeated ABS and TRAC with C1231 (2009-2011 Camry)
- Toyota T-SB-0086-13: repeated ABS and TRAC warning light with C1231 on Bosch ABS/VSC (2009-2011 Camry)
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error