What Does U1182 Mean?
The receiving module cannot obtain valid Primary ID data from another control module via the SCP J1850 network. Primary ID typically refers to critical identification or status data needed for module-to-module coordination.
Common Causes
35%
Faulty Powertrain Control Module (PCM) or Body Control Module not broadcasting Primary ID
30%
SCP network bus wiring fault, short, or open circuit preventing data transmission
20%
Failed instrument cluster or other module expecting Primary ID data
15%
Network bus overload from shorted module or excessive electrical noise
Diagnostic Steps
1
Step 1: Use scan tool network monitoring function to identify which module is setting the code and which module's data is missing
2
Step 2: Check for multiple U-codes to determine if problem is with one transmitting module or entire bus failure
3
Step 3: Test SCP bus voltage levels (should be approximately 5-7V nominal with proper biasing)
4
Step 4: Inspect all connectors on suspected modules for water intrusion, corrosion, or bent pins
5
Step 5: Disconnect modules one at a time to isolate a potentially shorted module causing bus communication failure
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The receiving module cannot obtain valid Primary ID data from another control module via the SCP J1850 network. Primary ID typically refers to critical identification or status data needed for module-to-module coordination.
The most common cause of U1182 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Faulty Powertrain Control Module (PCM) or Body Control Module not broadcasting Primary ID
Typical repair costs for U1182 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause loss of gauge cluster functions, warning lights, or coordination between powertrain and body systems. Verify all critical safety systems are operational before driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1182 to identify the root cause.
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Quick Info
Category
Network
System
Vehicle Communication Network
Difficulty
Type
Manufacturer
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