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Common Symptoms of a Failing Control Module

1. Check Engine Light or Warning Lights

   • Persistent or multiple warning lights on the dashboard, even after clearing codes.

2. Erratic Engine Behavior

   • Hard starting or no start condition

   • Stalling or misfires

   • Poor acceleration or loss of power

3. Transmission Issues

   • Harsh or delayed shifting

   • Transmission stuck in one gear (limp mode)

4. Electrical Malfunctions

   • Power windows, locks, lights, or dashboard not working properly

   • Random electronic glitches

5. Communication Errors

   • Inability to communicate with the module using a diagnostic scanner

   • CAN bus communication faults (U-codes)