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C121C Diagnostic Trouble Code Discussion for April 2019

Torque request signal denied

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Trouble Ticket Help Requests for DTC C121C
Help Request Posted
2015 Chrysler 200 S 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1C3CCCBG8F
C121C: ABS system -Torque request Signal Denied-Stored. ... had issues with the shaking and misfire on idle (idle RPM is around 780, in scanner designated RPM is 800). When engine is running over 900 RPM everything seems to be smooth and fine, feels car has a lot of power. We have Snap On Modis Edge with new s...
April 02, 2019