What Does U1119 Mean?
Similar to U1118, this code indicates invalid or missing data from a different primary identifier on the SCP J1850 network. Multiple U-codes typically indicate widespread network communication issues.
Common Causes
35%
Damaged or corroded SCP bus wiring or terminating resistor failure
30%
Failed control module not broadcasting required primary ID messages
20%
Electrical interference on network from aftermarket accessories or faulty module
15%
Low voltage condition during cranking or operation affecting multiple modules
Diagnostic Steps
1
Step 1: Document all current and pending U-codes to identify pattern and affected modules
2
Step 2: Check for aftermarket electrical accessories and temporarily disconnect to test network
3
Step 3: Monitor network voltage on SCP bus lines (+ and -) with oscilloscope looking for proper message traffic
4
Step 4: Perform module isolation by disconnecting modules one at a time to identify communication disruptor
5
Step 5: Test terminating resistor value (should be approximately 100-120 ohms across SCP+ and SCP-)
Estimated Repair Cost
$150 - $1,400
Parts + labor, varies by vehicle and location
Similar to U1118, this code indicates invalid or missing data from a different primary identifier on the SCP J1850 network. Multiple U-codes typically indicate widespread network communication issues.
The most common cause of U1119 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Damaged or corroded SCP bus wiring or terminating resistor failure
Typical repair costs for U1119 range from $150 to $1,400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause erratic gauge readings, warning light issues, or intermittent system failures. Vehicle is generally safe to drive but should be repaired to prevent further issues.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1119 to identify the root cause.
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Quick Info
Category
Network
System
Vehicle Communication Network
Difficulty
Type
Manufacturer
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