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GM U1210 Code – Network Checksum Error
Limited
Safe to drive :
GM vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to other manufacturers.
Medium
Severity level :
When Does This Code Appear on the Vehicles
GM U1210 occurs when modules report checksum error over Class 2 bus.
What This Code means on the Vehicles
Indicates data integrity issue on network, GM-specific.
Why This is different from a generic OBD2 Code
Generic scanners cannot detect module checksum errors.
Common Situations That Trigger This Code
Faulty modules; Wiring errors; Software mismatch.
What Will NOT Fix This Code
Ignoring checksum error; Replacing unrelated modules.
How to Clear This Code on Vehicles
Verify module integrity; inspect wiring; clear code with Tech2/OEM.
Related Manufacturer Specific Codes
GM U1211; GM U1212
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