What Does U1122 Mean?
The receiving module cannot obtain valid odometer data over the SCP network. This specifically indicates the instrument cluster or odometer-storing module is not communicating properly with other modules.
Common Causes
40%
Failed instrument cluster unable to broadcast odometer information
25%
Corrupted cluster memory or calibration data preventing valid odometer transmission
20%
Poor connection or corrosion at instrument cluster connector
15%
Network communication failure between cluster and requesting module
Diagnostic Steps
1
Step 1: Verify which module is requesting odometer data and which is setting the code using factory scan tool
2
Step 2: Remove and inspect instrument cluster connector for corrosion, pushed-back pins, or damage
3
Step 3: Check cluster power and ground circuits; verify proper voltage at cluster connector
4
Step 4: Attempt cluster reprogramming or reconfiguration if cluster powers up but data is invalid
5
Step 5: Replace instrument cluster if physical connections test good but odometer data remains invalid
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The receiving module cannot obtain valid odometer data over the SCP network. This specifically indicates the instrument cluster or odometer-storing module is not communicating properly with other modules.
The most common cause of U1122 (SCP (J1850) Invalid or Missing Data for Odometer) is: Failed instrument cluster unable to broadcast odometer information
Typical repair costs for U1122 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive. Odometer may not display or record correctly, and service reminder systems may not function. Other systems requiring odometer data may be affected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1122 to identify the root cause.
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Quick Info
Category
Network
System
Instrument Cluster / Vehicle Communication Network
Difficulty
Type
Manufacturer
Recommended Tools
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