What Does U1113 Mean?
Another instance of invalid or missing data on the SCP J1850 network from a primary module. Multiple U1111/U1112/U1113 codes together indicate widespread network communication problems.
Common Causes
30%
Corroded or loose network bus connector at central junction box
25%
Failed restraint control module (airbag module) network interface
20%
Damaged wiring in underhood harness from heat or abrasion
15%
Defective HVAC control module communication circuit
10%
Water intrusion in module connectors causing resistance
Diagnostic Steps
1
Step 1: Identify which specific module is listed as source of missing data in scan tool freeze frame data
2
Step 2: Disconnect suspect module and check connector pins for corrosion, pushed back pins, or damage
3
Step 3: Use wiring diagram to trace SCP network circuits from suspect module to network junction point
4
Step 4: Test for proper termination resistance at network endpoints (should measure 60-120 ohms total)
5
Step 5: If wiring tests good, substitute known-good module to verify failed module as root cause
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
Another instance of invalid or missing data on the SCP J1850 network from a primary module. Multiple U1111/U1112/U1113 codes together indicate widespread network communication problems.
The most common cause of U1113 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Corroded or loose network bus connector at central junction box
Typical repair costs for U1113 range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Depending on affected module, may disable airbags, ABS, or other safety systems. Warning lights may illuminate indicating system faults requiring immediate attention.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1113 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication
Difficulty
Type
Manufacturer
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