What Does U1192 Mean?
Fifth module communication fault on SCP network. With five consecutive U-codes present, this strongly indicates a systemic network failure rather than multiple individual module failures.
Common Causes
45%
Complete network bus failure due to short to ground or power
30%
Master control module (PCM/BCM) failure disrupting entire network
15%
Aftermarket accessory or trailer wiring causing network interference
10%
Severe corrosion in main harness affecting multiple circuits
Diagnostic Steps
1
Step 1: Disconnect any aftermarket accessories or trailer wiring and retest
2
Step 2: Measure SCP bus for shorts to ground or power at DLC - should be isolated
3
Step 3: Check for water damage in footwells, trunk, or under-hood junction boxes
4
Step 4: Use wiring diagrams to trace SCP bus through entire harness for damage points
5
Step 5: Consider network bus analyzer tool for advanced protocol diagnostics
Estimated Repair Cost
$250 - $2,000
Parts + labor, varies by vehicle and location
Fifth module communication fault on SCP network. With five consecutive U-codes present, this strongly indicates a systemic network failure rather than multiple individual module failures.
The most common cause of U1192 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Complete network bus failure due to short to ground or power
Typical repair costs for U1192 range from $250 to $2,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Complete network failure may result in multiple system shutdowns. Vehicle may not start or may have severely limited functionality affecting safe operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1192 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.
