What Does U1140 Mean?
The receiving module cannot obtain valid data from the gateway module on the SCP J1850 network. The gateway module translates data between different communication protocols or network segments.
Common Causes
40%
Faulty gateway module or body control module (BCM)
25%
Corrupted wiring or short circuit in gateway communication lines
20%
Software corruption or outdated firmware in gateway module
15%
Poor power supply or ground to gateway module
Diagnostic Steps
1
Step 1: Check for technical service bulletins (TSBs) related to gateway module software updates
2
Step 2: Verify power and ground circuits to the gateway module using a multimeter
3
Step 3: Monitor live data stream to identify if gateway module is transmitting at all on the network
4
Step 4: Inspect gateway module connectors for corrosion, pushed-back pins, or water intrusion
5
Step 5: Attempt to reprogram or flash gateway module if available; replace if reprogramming fails
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The receiving module cannot obtain valid data from the gateway module on the SCP J1850 network. The gateway module translates data between different communication protocols or network segments.
The most common cause of U1140 (SCP (J1850) Invalid or Missing Data for Gateway) is: Faulty gateway module or body control module (BCM)
Typical repair costs for U1140 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause loss of communication between vehicle systems, affecting features like power windows, climate control, or instrument displays. Vehicle typically remains drivable.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1140 to identify the root cause.
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Quick Info
Category
Network
System
Communication Network
Difficulty
Type
Manufacturer
Recommended Tools
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