What Does U0148 Mean?
The module storing this code has lost communication with Gateway C on the vehicle's communication network. Gateway C acts as a communication bridge in the vehicle's multi-network architecture.
Common Causes
35%
Gateway C module failure or internal fault
30%
Damaged or corroded wiring harness to Gateway C
20%
Poor power or ground supply to Gateway C
10%
CAN bus wiring short or open circuit
5%
Software corruption or module requiring reprogramming
Diagnostic Steps
1
Step 1: Perform network communication test to determine which modules are affected by Gateway C loss
2
Step 2: Check voltage supply and ground integrity at Gateway C module using DVOM
3
Step 3: Thoroughly inspect Gateway C connectors for corrosion, pin damage, or moisture
4
Step 4: Verify CAN bus termination and measure bus resistance between High and Low lines
5
Step 5: Replace or reprogram Gateway C module if wiring and power supply are confirmed good
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The module storing this code has lost communication with Gateway C on the vehicle's communication network. Gateway C acts as a communication bridge in the vehicle's multi-network architecture.
The most common cause of U0148 (Lost Communication With Gateway "C") is: Gateway C module failure or internal fault
Typical repair costs for U0148 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause loss of various vehicle functions depending on which systems communicate through Gateway C. Could affect comfort, convenience, or operational systems.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0148 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Vehicle Communication Network
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
