What Does U1207 Mean?
Additional or persistent primary identification communication failure on the SCP network. When seen with U1206, indicates serious anti-theft system malfunction requiring immediate attention.
Safety Warning
Vehicle may be rendered inoperable, creating stranded motorist situation. Security system may not protect vehicle from theft.
Common Causes
35%
Complete failure of body control module or anti-theft controller
30%
Corrupted module programming or software failure
20%
Network bus short circuit preventing all security communication
15%
Power supply issue causing intermittent module resets
Diagnostic Steps
1
Step 1: Check for Technical Service Bulletins related to anti-theft system reprogramming
2
Step 2: Verify all security-related modules have proper software versions installed
3
Step 3: Perform module reset and initialization procedures per manufacturer specifications
4
Step 4: Test for parasitic draw that might cause low voltage conditions during key recognition
5
Step 5: Replace body control module and reprogram keys if communication circuits test good
Estimated Repair Cost
$250 - $1,500
Parts + labor, varies by vehicle and location
Additional or persistent primary identification communication failure on the SCP network. When seen with U1206, indicates serious anti-theft system malfunction requiring immediate attention.
The most common cause of U1207 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Complete failure of body control module or anti-theft controller
Typical repair costs for U1207 range from $250 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may be rendered inoperable, creating stranded motorist situation. Security system may not protect vehicle from theft.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1207 to identify the root cause.
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Quick Info
Category
Network
System
Anti-Theft/Security System
Difficulty
Type
Manufacturer
Recommended Tools
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