What Does U1016 Mean?
Another primary module ID is missing from the SCP network communication. When seen with other U10xx codes, this typically indicates a widespread network communication failure rather than individual module issues.
Common Causes
35%
Main SCP bus circuit shorted to ground or power, disabling entire network
25%
Failed restraint control module (RCM) or airbag module
20%
Powertrain control module communication circuit failure
15%
Water intrusion in module or connector causing network disruption
5%
Failed network termination or incorrect bus loading
Diagnostic Steps
1
Step 1: Visually inspect all accessible harness sections for chafing, water damage, or rodent damage
2
Step 2: Identify the specific module ID for U1016 using factory service information
3
Step 3: Check for power and ground at the missing module; verify module is receiving proper voltage
4
Step 4: Disconnect suspect module and recheck network; a failed module can disable entire bus
5
Step 5: Perform network integrity test checking for proper bus voltage levels and signal patterns
Estimated Repair Cost
$150 - $1,300
Parts + labor, varies by vehicle and location
Another primary module ID is missing from the SCP network communication. When seen with other U10xx codes, this typically indicates a widespread network communication failure rather than individual module issues.
The most common cause of U1016 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Main SCP bus circuit shorted to ground or power, disabling entire network
Typical repair costs for U1016 range from $150 to $1,300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
If airbag module is affected, SRS system may be non-functional creating serious safety risk. Other system losses may impact vehicle control features.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1016 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication
Difficulty
Type
Manufacturer
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