What Does U1213 Mean?
Additional instance of missing primary identification data on the SCP network, likely set by a different receiving module than U1212. This suggests a widespread communication issue affecting multiple systems attempting to access primary control data.
Common Causes
35%
Primary control module (PCM/BCM) power loss or reset condition
30%
Network bus short to ground or voltage causing data corruption
20%
Failed module preventing network communication for all nodes
15%
Corroded or loose connections at primary module or junction points
Diagnostic Steps
1
Step 1: Document all modules setting U121X codes to identify communication pattern
2
Step 2: Perform network integrity test by checking resistance and voltage on SCP bus
3
Step 3: Disconnect modules one at a time to isolate a potentially shorted node pulling bus down
4
Step 4: Inspect all major harness routing areas for damage, especially near heat sources or moving parts
5
Step 5: Check for technical service bulletins related to network communication for specific vehicle
Estimated Repair Cost
$200 - $1,000
Parts + labor, varies by vehicle and location
Additional instance of missing primary identification data on the SCP network, likely set by a different receiving module than U1212. This suggests a widespread communication issue affecting multiple systems attempting to access primary control data.
The most common cause of U1213 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Primary control module (PCM/BCM) power loss or reset condition
Typical repair costs for U1213 range from $200 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Moderate safety impact. Multiple vehicle systems may malfunction simultaneously. Warning lights may be inaccurate, making it difficult to assess vehicle condition.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1213 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication / Multiple Body/Chassis Systems
Difficulty
Type
Manufacturer
Recommended Tools
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