Error code
OBD2 U0128
OBD2U0128
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Lost Communication With Park Brake Control Module.
Severity
moderateCan drive, but should address issue soon to avoid further complications.
Summary
U0128 indicates that there is no communication between the car's data bus and the parking brake control module, which can affect braking system functions.
Symptoms
- Brake warning light on
- Parking brake malfunction
Common Causes
- Faulty parking brake control module
- Data bus connector issues or damage
- Electrical problems in the parking brake circuit
Diagnosis
- Check for physical damage to the parking brake control module and its connectors
- Inspect wiring harness between the parking brake control module and data bus
Fixes
- Replace faulty parking brake control module or repair damaged wiring
FAQ
How do I diagnose U0128?
Use a diagnostic tool like Torque Pro to check for additional codes and inspect the physical connections of the parking brake control module.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- U0100Lost Communication With ECM/PCM A
- U0101Lost Communication with TCM
- U0102Lost Communication with Transfer Case Control Module
- U0103Lost Communication With Gear Shift Module
- U0104Lost Communication With Cruise Control Module
- U0105Lost Communication With Fuel Injector Control Module
- U0106Lost Communication With Glow Plug Control Module
- U0107Lost Communication With Throttle Actuator Control Module
- U0108Lost Communication With Alternative Fuel Control Module
- U0109Lost Communication With Fuel Pump Control Module
- U0110Lost Communication With Drive Motor Control Module
- U0111Lost Communication With Battery Energy Control Module 'A'