What Does U1013 Mean?
The module receiving this code is not detecting valid data messages on the SCP (Standard Corporate Protocol) J1850 network bus from a specific primary module ID. This indicates a communication failure between networked control modules, preventing proper data exchange.
Common Causes
35%
Faulty or disconnected powertrain control module (PCM) or engine control module (ECM)
30%
Damaged or corroded wiring in the SCP data bus circuit between modules
20%
Failed instrument cluster or body control module not transmitting data
10%
Poor ground connection affecting network communication
5%
Low battery voltage or charging system issues affecting module operation
Diagnostic Steps
1
Step 1: Verify battery voltage is at least 12.4V and charging system is functioning properly (14V while running)
2
Step 2: Inspect all network module connectors for corrosion, damage, or looseness; check pin fit and terminals
3
Step 3: Use scan tool to identify which specific module ID is missing and locate that module
4
Step 4: Check SCP bus wiring continuity and resistance (should be approximately 60-120 ohms between SCP+ and SCP- terminals)
5
Step 5: Test suspect module power and ground circuits; if circuits are good, module may need replacement
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The module receiving this code is not detecting valid data messages on the SCP (Standard Corporate Protocol) J1850 network bus from a specific primary module ID. This indicates a communication failure between networked control modules, preventing proper data exchange.
The most common cause of U1013 (SCP (J1850) Invalid or Missing Data for Primary Id) is: Faulty or disconnected powertrain control module (PCM) or engine control module (ECM)
Typical repair costs for U1013 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may experience reduced functionality of various systems depending on which module is offline. Drivability issues, gauge malfunctions, or loss of certain features may occur but vehicle is typically safe to drive.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1013 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication
Difficulty
Type
Manufacturer
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