What Does U1236 Mean?
Communication failure related to memory storage modules on the SCP J1850 network. The system cannot retrieve or receive valid stored data such as seat positions, radio presets, or climate control settings from memory modules.
Common Causes
35%
Memory seat module or driver information module internal failure
30%
Corrupted EEPROM or flash memory data within control modules
20%
Low battery voltage or power interruption during memory write operation
15%
SCP network communication fault preventing memory data transfer
Diagnostic Steps
1
Step 1: Test battery voltage and load test battery to ensure stable power supply above 12.4V
2
Step 2: Attempt to clear memory and reprogram module settings using scan tool or factory procedure
3
Step 3: Check for module software updates that may address memory corruption issues
4
Step 4: Verify SCP bus communication between memory module and other network modules
5
Step 5: Replace memory storage module if memory chip has failed or cannot be reprogrammed
Estimated Repair Cost
$200 - $900
Parts + labor, varies by vehicle and location
Communication failure related to memory storage modules on the SCP J1850 network. The system cannot retrieve or receive valid stored data such as seat positions, radio presets, or climate control settings from memory modules.
The most common cause of U1236 (SCP (J1850) Invalid or Missing Data for Memory Storage) is: Memory seat module or driver information module internal failure
Typical repair costs for U1236 range from $200 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No direct safety impact. Loss of memory functions results in convenience feature loss such as seat positions and radio presets but does not affect vehicle safety or operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1236 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Body Control/Memory Systems
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
