What Does U1193 Mean?
Sixth module communication fault indicating widespread SCP network failure. Combined with previous codes, this requires comprehensive network diagnosis starting with bus integrity and master controller function.
Common Causes
40%
Damaged main wiring harness from rodent damage, rubbing, or age
35%
Failed network master controller preventing all module communication
15%
Power or ground distribution problem affecting multiple modules
10%
Severe electromagnetic interference disrupting network signals
Diagnostic Steps
1
Step 1: Perform complete visual inspection of all accessible wiring harnesses
2
Step 2: Test PCM and BCM for proper operation and programming version
3
Step 3: Check all major ground points with voltage drop testing under load
4
Step 4: Use oscilloscope to analyze network bus signal quality and interference
5
Step 5: Compare network module configuration to factory specifications - verify all modules programmed correctly
Estimated Repair Cost
$250 - $2,000
Parts + labor, varies by vehicle and location
Sixth module communication fault indicating widespread SCP network failure. Combined with previous codes, this requires comprehensive network diagnosis starting with bus integrity and master controller function.
The most common cause of U1193 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Damaged main wiring harness from rodent damage, rubbing, or age
Typical repair costs for U1193 range from $250 to $2,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Extensive network failure creates unpredictable vehicle behavior. Multiple safety systems may be non-functional making the vehicle potentially unsafe to drive.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1193 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
Network Communication
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
