What Does U1250 Mean?
The SCP J1850 network is not receiving valid Vehicle Identification Number (VIN) data from the module that stores it. This indicates VIN is not programmed, corrupted, or not being transmitted properly.
Common Causes
40%
Control module VIN not programmed or corrupted (typically PCM, BCM, or instrument cluster)
25%
Recent module replacement where VIN was not properly programmed into new module
20%
Module memory corruption or EEPROM failure preventing VIN retrieval
10%
SCP bus communication failure preventing VIN broadcast from storage module
5%
Software version mismatch between modules after programming or update
Diagnostic Steps
1
Step 1: Use scan tool to attempt to read VIN from all modules individually and document which modules show valid VIN
2
Step 2: Compare VIN stored in modules against vehicle door jamb or windshield VIN to verify correct data
3
Step 3: Check service history for recent module replacements that may not have been properly programmed
4
Step 4: Attempt to reprogram VIN into affected module using manufacturer-specific programming tools
5
Step 5: If VIN programming fails, check for module hardware failure or EEPROM corruption requiring module replacement
Estimated Repair Cost
$150 - $400
Parts + labor, varies by vehicle and location
The SCP J1850 network is not receiving valid Vehicle Identification Number (VIN) data from the module that stores it. This indicates VIN is not programmed, corrupted, or not being transmitted properly.
The most common cause of U1250 (SCP (J1850) Invalid or Missing Data for Vehicle Id (VIN)) is: Control module VIN not programmed or corrupted (typically PCM, BCM, or instrument cluster)
Typical repair costs for U1250 range from $150 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may be drivable but could face emissions test failures, security system issues, or module communication problems. Legal issues may arise if VIN mismatch is detected during inspection.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1250 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication / Vehicle Security / Module Programming
Difficulty
Type
Manufacturer
Recommended Tools
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