What Does U1341 Mean?
The control module is not receiving valid vehicle speed data over the SCP (J1850) communication network. This missing or corrupted data prevents proper operation of systems that rely on vehicle speed information.
Common Causes
30%
SCP communication bus fault preventing speed data transmission from ABS or PCM
25%
Failed or intermittent wheel speed sensors preventing speed calculation and broadcast
25%
ABS module or PCM fault preventing vehicle speed message broadcasting
20%
Corroded or damaged connectors at speed signal source module
Diagnostic Steps
1
Step 1: Check for speed sensor codes (C-codes) and verify all wheel speed sensors are functioning properly
2
Step 2: Monitor vehicle speed data on scan tool while driving to confirm speed signal is present and accurate
3
Step 3: Verify communication with all modules on the SCP network to identify if this is an isolated issue
4
Step 4: Inspect connectors at the module generating vehicle speed data (typically ABS module or PCM)
5
Step 5: Check for software updates for modules that generate or receive vehicle speed data
Estimated Repair Cost
$100 - $1,000
Parts + labor, varies by vehicle and location
The control module is not receiving valid vehicle speed data over the SCP (J1850) communication network. This missing or corrupted data prevents proper operation of systems that rely on vehicle speed information.
The most common cause of U1341 (SCP (J1850) Invalid or Missing Data for Function Read Vehicle Speed) is: SCP communication bus fault preventing speed data transmission from ABS or PCM
Typical repair costs for U1341 range from $100 to $1,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Loss of speed data affects speedometer, cruise control, ABS, traction control, and transmission shift points. Vehicle may be unsafe at highway speeds due to disabled safety systems.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1341 to identify the root cause.
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Quick Info
Category
Network
System
Network Communications / Vehicle Speed
Difficulty
Type
Manufacturer
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