OBD-II code · Network
U0418 Invalid Data Received from Brake System Control Module
The Brake System Control Module is present on the data bus but the values it reports are implausible — out of range, frozen, or failing the checksum or rolling-count check. The receiving modules reject the data. ABS and ESP functions are limited. Causes include a faulty sensor feeding the module, internal computation errors, a software or calibration mismatch after a repair, or bus interference corrupting the frames.
Is it safe to drive with U0418?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- PossibleBrake module internal fault
- PossibleCAN corruption causing checksum errors
- Less likelyGateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake System Control Module, Can Bus Wiring
Related codes
- U0419Invalid Data Received from Brake System Control Module
- U0415Invalid Data Received from ABS Control Module
- U0416Invalid Data Received from Vehicle Dynamics Control Module
- U0417Invalid Data Received from Park Assist Control Module
- U041AInvalid Data Received From Battery Isolation/Voltage Stabilization Control Module
- U041BInvalid Data Received From Exhaust Gas Sensor Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.