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What does it mean when the tcs light turn off and car starts jerking on a 1995 Mazda millenia?

When the TCS (Traction Control System) light turns off and the car starts jerking on a 1995 Mazda Millenia, it could indicate a few potential issues:

1. TCS System Malfunction: If the TCS light turns off unexpectedly, it could indicate a malfunction in the TCS system itself. The TCS system is designed to prevent wheel slippage by reducing engine power and/or applying selective braking to the wheels. If the system is not functioning properly, it may cause the car to jerk as the wheels lose and regain traction.

2. Wheel Speed Sensor Problem: The TCS system relies on wheel speed sensors to monitor the rotation of each wheel. If one or more of these sensors is faulty or not sending accurate signals, it can confuse the TCS system and lead to jerking or erratic behavior.

3. Traction Control Module Failure: The TCS module, which is the central control unit for the traction control system, could be faulty or malfunctioning. This could lead to the TCS system not engaging properly or working erratically, causing the car to jerk.

4. Faulty Wiring or Connections: Electrical issues, such as faulty wiring or loose connections in the TCS system, could also cause the TCS light to turn off and the car to jerk.

To diagnose the exact cause of the issue, it's important to have the vehicle inspected by a qualified mechanic. They can use diagnostic tools and examine the TCS system components to identify the root cause of the problem and recommend appropriate repairs or replacements.