C121C - Torque Request Signal Denied

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Anti-Lock Brake System (ABS) Module
  • Faulty Powertrain Control Module (PCM)

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C121c Description

The Anti-Lock Brake System (ABS) Module monitors the Yaw Control/Traction Control System. The ABS Module sets the OBDII code if engine management relevant for Automatic Yaw Control/Traction Control System control can be accomplished.
OBDII Code C121c - Torque Request Signal Denied - AutoCodes.com

C121C Information for specific makes

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