Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
3Original wording in English
TOYOTA
Some 2009 ? 2011 model year North American production (NAP) vehicles equipped with BOSCH® made ABS/VSC systems may exhibit a repeated ABS and TRAC Warning Light ?ON? with Diagnostic Trouble Code (DTC) C1231 present. The ABS ECU logic has been modified to address this condition.
TOYOTA
TOYOTA: ON SOME VEHICLES, EXHIBITING THE WARNING LIGHT ON, DUE TO REPEATED ABS AND TRAC, WITH DIAGNOSTIC TROUBLE CODE (DTC) C1231 PRESENT AND TO ADDRESS CONDITION THE ABS ECU LOGIC WAS MODIFIED. MODEL 2009-2011 CAMRY. *PE
TOYOTA
VSC LIGHT ON CONDITION WITH DIAGNOSTIC TROUBLE CODE C1231 IN THE SKID CONTROL COMPUTER MEMORY. A MODIFICATION TO THE SKID CONTROL COMPUTER LOGIC HAS BEEN MADE TO PREVENT THIS CONDITION. *TT
Check vehicle applicability
4A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Speed Wheel Sensor Rear Center Circuit Open
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.