Что означает ошибка
This DTC indicates Countershaft Speed Sensor (SESC). It belongs to the transmission system group and is classified as internal ECU/control module fault. Reference: code P105816.
Вероятные причины
- Low/incorrect transmission fluid or pressure issue Solenoid/actuator or sensor fault Harness/connector problem Mechanical wear or sticking component Incorrect adaptation/calibration Internal ECU memory/processor/driver issue Power or ground disturbance causing ECU reset Software/calibration corruption or mismatch
Что проверить сначала
- Confirm whether the DTC is active or stored and record freeze-frame data. Clear the DTC and repeat the operating conditions that triggered it. Inspect the related connector, pins and harness for damage, corrosion, moisture or poor pin tension. Compare the related live-data value with the expected value and with related sensors. Verify power supply, ground and signal integrity for the related circuit.
Ведомая диагностика
- Read all active and stored DTCs, freeze-frame data and related live-data parameters. Clear the fault memory and reproduce the complaint under the recorded operating conditions. Visually inspect the component, connector and harness
- repair obvious damage before deeper testing. Measure power supply, ground and signal/reference voltage under load where applicable. Compare commanded versus actual values and perform actuator/service tests with OEM-level diagnostics. If wiring, power supply and related components test good but the DTC returns, follow the OEM pinpoint test for module/component replacement or software update.
Сервисное примечание
Use OEM service information and wiring diagrams for the exact model, ECU variant and software level. After repair, clear DTCs, perform required adaptations/resets and confirm the fault does not return during a road or service test.