U0101Wysoki
Utrata komunikacji z TCM (sterownik skrzyni)
Komunikacja sieciowa
Sprawdź szczegóły →U0300
WysokiInternal Control Module Software Incompatibility. The code indicates a software version conflict between ECU modules on the vehicle's CAN network.
OBD-II (EN): Invalid Data Received From ECM/PCM
Code U0300 indicates detected software incompatibility within one of the vehicle's control modules – most often appears after ECU replacement or update. The problem can cause limp mode and disturbances in many vehicle systems. Due to the need for access to specialized manufacturer software, diagnosis and repair should be carried out by an authorized service center.
Symptoms
Check Engine light on, limp mode, noticeable loss of engine power, improper engine-automatic transmission cooperation, disturbed ABS and ESP operation, other warning lights on the dashboard, incomplete OBD-II monitors, possible vehicle starting problems.
Possible causes
• Software version incompatibility after updating or replacing an ECU/TCM module • Incorrectly programmed or recoded control module • Replacing a module with a unit having a different firmware version than other ECUs • Damage to flash memory inside the control module • Error during software update (interrupted flash procedure)
Affected systems
Related codes
B1000Wysoki
Moduł sterowania nadwoziem (BCM) — usterka wewnętrzna
Nadwozie
Sprawdź szczegóły →U0121Wysoki
Utrata komunikacji z modułem ABS
Komunikacja sieciowa
Sprawdź szczegóły →U0100Krytyczny
Utrata komunikacji z ECM (sterownik silnika)
Komunikacja sieciowa
Sprawdź szczegóły →Does code U0300 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.