What Does U1098 Mean?
The control module is not receiving valid speed control data messages over the J1850 network. This affects communication between modules responsible for vehicle speed control functions like cruise control.
Common Causes
35%
Failed speed control servo or amplifier module
25%
Damaged wiring between speed control components and network bus
20%
Failed PCM not sending or receiving speed control data
12%
Corroded module connectors affecting network communication
8%
Network termination resistor failure
Diagnostic Steps
1
Step 1: Check if cruise control/speed control is functional; test operation from steering wheel controls
2
Step 2: Monitor live data for vehicle speed signal and speed control module communication status
3
Step 3: Inspect speed control servo/amplifier connector for corrosion, water intrusion, or damage
4
Step 4: Test voltage and ground at speed control module; verify proper network bus voltage (2.5V nominal)
5
Step 5: Check for damaged wiring between PCM and speed control module, especially in areas prone to chafing
Estimated Repair Cost
$120 - $800
Parts + labor, varies by vehicle and location
The control module is not receiving valid speed control data messages over the J1850 network. This affects communication between modules responsible for vehicle speed control functions like cruise control.
The most common cause of U1098 (SCP (J1850) Invalid or Missing Data for Vehicle Speed Control) is: Failed speed control servo or amplifier module
Typical repair costs for U1098 range from $120 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Cruise control will not function, but vehicle remains safe to drive. Driver must manually control vehicle speed at all times.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1098 to identify the root cause.
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Quick Info
Category
Network
System
Speed Control/Cruise Control System
Difficulty
Type
Manufacturer
Recommended Tools
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