What Does U1245 Mean?
Secondary or duplicate communication error on the SCP J1850 network for interior environment data. This typically indicates a persistent or intermittent loss of data from interior climate or environment monitoring modules.
Common Causes
30%
Intermittent wiring fault or poor connection in the SCP network causing repeated communication failures
25%
Climate control module intermittent failure or loose connector
20%
Body Control Module internal communication buffer overflow or software glitch
15%
Multiple interior sensors failing simultaneously creating data conflicts
10%
Electromagnetic interference affecting SCP bus communication integrity
Diagnostic Steps
1
Step 1: Clear all codes and perform a test drive to determine if code returns immediately or intermittently
2
Step 2: Wiggle test all connectors and wiring harnesses related to interior environment modules while monitoring for code recurrence
3
Step 3: Check for aftermarket equipment or recent repairs that may have introduced electrical interference
4
Step 4: Use bi-directional scan tool functions to command climate control operations and monitor module responses
5
Step 5: Compare data from both U1244 and U1245 to determine if same module or different modules are affected
Estimated Repair Cost
$120 - $750
Parts + labor, varies by vehicle and location
Secondary or duplicate communication error on the SCP J1850 network for interior environment data. This typically indicates a persistent or intermittent loss of data from interior climate or environment monitoring modules.
The most common cause of U1245 (SCP (J1850) Invalid or Missing Data for Interior Environment) is: Intermittent wiring fault or poor connection in the SCP network causing repeated communication failures
Typical repair costs for U1245 range from $120 to $750, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No direct safety impact. Vehicle can be operated normally, though climate control may function improperly or not at all.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1245 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication / Climate Control
Difficulty
Type
Manufacturer
Recommended Tools
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