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Genel OBD2
🟡 Medium
Genel OBD2
U0121
Lost Communication with ABS Control Module
The U0121 diagnostic trouble code (DTC) indicates a Lost Communication with ABS Control Module. This signifies a failure in the CAN-bus communication network between various vehicle control modules. This anomaly was detected during the ECM's internal diagnostic self-test, indicating that the system is unable to maintain steady-state operation.
Brand
Genel OBD2
Fault Code
U0121
Severity
🟡 Medium
Models
Tüm marka ve modeller
🛠️ Diagnostic Overview
Difficulty Level
🛠️🛠️
Medium (Moderate)
Estimated Time
⏱️ 1-2 Hours
🧰 Required Tools
- ✓ Socket Wrench & Hand Tools
⚠️ Possible Causes
- Faulty ABS module
- CAN bus fault
- Power/ground issue
🔧 Recommended Fixes
- Check ABS module power
- Inspect CAN bus
- Replace ABS module
🚗 Commonly Affected Vehicles
🏭 Genel OBD2 – Other Common Fault Codes