U0101Wysoki
Utrata komunikacji z TCM (sterownik skrzyni)
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Sprawdź szczegóły →C0400
WysokiTransmission range control circuit error – low signal level. The controller detected incorrect voltage in the transmission range sensor circuit.
OBD-II (EN): Gear Range Control Circuit Low Input
Code C0400 signals a problem in the electrical circuit of the transmission range sensor – the controller receives a signal voltage that is too low. The cause could be a damaged sensor, an open circuit in the harness, or oxidized connectors. Due to the possibility of the vehicle entering limp mode or having starting problems, a quick diagnosis at a workshop is recommended.
Symptoms
- Check engine light (MIL) on the dashboard - Incorrect gear selector (PRND) indications on the display - Vehicle may not start (starter lockout without 'P' signal) - Hard or incorrect automatic transmission operation - Transmission enters limp mode - Jerking or lack of smooth gear shifting
Possible causes
- Damaged or worn transmission range sensor (inhibitor switch) - Open or short circuit in the range sensor wiring harness - Oxidized, loose, or damaged sensor electrical connectors - Incorrect adjustment (calibration) of the transmission range sensor - Transmission control module (TCM) or CAN bus damage
Affected systems
skrzynia biegów automatycznaczujnik zakresu biegówsterownik skrzyni biegów (TCM)Magistrala CANobwód elektryczny napędu
Related codes
Does code C0400 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.