C1201

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Engine Control System Malfunction (ABS/VSC Interlock - Toyota/Lexus)

What this code means

On Toyota/Lexus vehicles, the ABS/stability system disables itself because the engine ECU reported a fault. C1201 accompanies an engine code.

Common symptoms

ABS, VSC and check engine lights together
Stability control disabled

Most common causes

Any active engine fault (read the P-codes)
Commonly a loose fuel cap or O2 sensor issue

Can you keep driving?

Fix the underlying engine code and this one clears itself. Braking works normally, but stability control is off.

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Descriptions are for guidance only. Accurate diagnosis requires a workshop inspection.