What Does U1200 Mean?
The power seat control module is not transmitting or receiving valid position/movement data over the SCP J1850 network. Communication failure prevents proper seat memory and adjustment coordination.
Common Causes
40%
Failed seat control module or memory module
30%
Damaged wiring under seat or at seat track connections
20%
Body Control Module communication fault with seat system
10%
SCP network problem affecting seat control module node
Diagnostic Steps
1
Step 1: Use scan tool to verify which seat module (driver/passenger) is not communicating on network
2
Step 2: Check power and ground connections under seat at module connector with multimeter
3
Step 3: Inspect seat track wiring for damage from seat movement or debris
4
Step 4: Test SCP bus signal at seat module connector (should show 0-7V network activity)
5
Step 5: Replace seat control module if power, ground, and bus signals are present but no communication
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The power seat control module is not transmitting or receiving valid position/movement data over the SCP J1850 network. Communication failure prevents proper seat memory and adjustment coordination.
The most common cause of U1200 (SCP (J1850) Invalid or Missing Data for Seat Motion / Control) is: Failed seat control module or memory module
Typical repair costs for U1200 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Power seat adjustment and memory functions may not work. Driver may be unable to achieve optimal seating position for safe vehicle control.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1200 to identify the root cause.
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Quick Info
Category
Network
System
Body Control Network / Power Seat System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
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