What Does U1042 Mean?
The control module is not receiving valid traction control data over the SCP J1850 network. This represents a communication fault between the traction control system and other modules that depend on this information.
Common Causes
40%
Faulty ABS/traction control module not transmitting data on network
25%
Damaged network wiring or connectors between modules
20%
Wheel speed sensor failure preventing traction control data generation
10%
Power supply issues to traction control module
5%
Network bus short circuit or termination resistance fault
Diagnostic Steps
1
Step 1: Check for diagnostic codes in the ABS/traction control module specifically
2
Step 2: Monitor SCP network traffic with scan tool to identify if traction control module is communicating
3
Step 3: Inspect traction control module connectors for corrosion, bent pins, or moisture intrusion
4
Step 4: Test wheel speed sensors and verify all are providing valid signals to traction control module
5
Step 5: Check power and ground circuits to the traction control module with multimeter
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The control module is not receiving valid traction control data over the SCP J1850 network. This represents a communication fault between the traction control system and other modules that depend on this information.
The most common cause of U1042 (SCP (J1850) Invalid or Missing Data for Traction Control) is: Faulty ABS/traction control module not transmitting data on network
Typical repair costs for U1042 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Traction control and stability control systems may be disabled, increasing risk of loss of control on slippery surfaces. ABS functionality may also be compromised.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1042 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Network Communication / Traction Control
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
