What Does U1226 Mean?
A module is requesting body status information but not receiving valid response data on the SCP network. This indicates communication failure between modules needing body system status updates.
Common Causes
40%
Body control module (BCM) failure or malfunction
25%
Open circuit in SCP bus network wiring
20%
Door ajar switch or body sensor malfunction
15%
Instrument cluster communication failure
Diagnostic Steps
1
Step 1: Identify which module is requesting body status data using scan tool module list
2
Step 2: Test continuity of SCP bus wiring between requesting module and BCM
3
Step 3: Check all door ajar switches and body sensor inputs to BCM for proper operation
4
Step 4: Monitor BCM output signals with scan tool to verify it's processing inputs correctly
5
Step 5: Replace BCM if it's not responding to valid inputs or network requests
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
A module is requesting body status information but not receiving valid response data on the SCP network. This indicates communication failure between modules needing body system status updates.
The most common cause of U1226 (SCP (J1850) Invalid or Missing Data for Body Status Request) is: Body control module (BCM) failure or malfunction
Typical repair costs for U1226 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May affect door ajar warnings, interior lights, and security systems. Vehicle is safe to drive but convenience and security features may be compromised.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1226 to identify the root cause.
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Quick Info
Category
Network
System
Body Control Network
Difficulty
Type
Manufacturer
Recommended Tools
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