Top Dead Center (TDC) Sensor Replacement
A Top Dead Center (TDC) sensor replacement service addresses engine starting and performance problems caused by a faulty sensor that helps identify the piston’s position at the top of its travel during the engine cycle. The sensor provides timing information to the engine control unit (ECU), supporting accurate ignition timing and, depending on the engine design, fuel injection control. When the TDC sensor fails or sends inaccurate signals, you may experience difficulty starting the engine, rough idling, engine misfires, poor performance, or an illuminated check engine light. During this service, a technician checks diagnostic trouble codes, inspects the sensor and its electrical connections, and tests the signal to determine whether the sensor is responsible for the fault. If the sensor is defective, it is replaced with a compatible component suited to your vehicle’s engine specifications. The technician then verifies the sensor signal and checks engine starting and operation to confirm the repair. Replacing a faulty TDC sensor helps restore accurate engine timing information, supports reliable starting, and promotes smoother engine operation and dependable performance.
