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Home >> Ford Truck >> 2007 >> E 450 V10-6.8L >> Repair and Diagnosis >> Brakes and Traction Control >> Antilock Brakes / Traction Control Systems >> Testing and Inspection >> Pinpoint Tests >> Anti-Lock Control - Traction Control and Stability Assist >> Test R: DTC C1991 - Module Calibration Failure

Test R: DTC C1991 - Module Calibration Failure

PINPOINT TEST R: DTC C1991 - MODULE CALIBRATION FAILURE

Normal Operation
The stability assist system needs to be calibrated whenever a component specific to the system is disconnected or a new component is installed.

Possible Causes
^ Anti-lock brake system (ABS) module
^ Sensor cluster
^ Steering wheel rotation sensor

R1-R3:




R4:




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