What Does U1194 Mean?
Communication failure specific to the power mirror control module on the SCP network. This code is more specific than the previous Primary ID codes, identifying mirror system data as invalid or missing.
Common Causes
40%
Failed door/mirror control module or driver door module
30%
Damaged wiring harness in door jamb or B-pillar area
20%
Corroded connectors in door or mirror assembly
10%
Failed mirror motor or switch causing module communication errors
Diagnostic Steps
1
Step 1: Test mirror functions manually - check if mirrors operate at all
2
Step 2: Locate mirror control module (often in driver door or behind kick panel) and inspect connector
3
Step 3: Check for voltage at mirror control module - verify power and ground circuits
4
Step 4: Inspect door jamb harness for flexing damage - common failure point
5
Step 5: Use scan tool to command mirror functions and monitor module response
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
Communication failure specific to the power mirror control module on the SCP network. This code is more specific than the previous Primary ID codes, identifying mirror system data as invalid or missing.
The most common cause of U1194 (SCP (J1850) Invalid or Missing Data for Mirrors) is: Failed door/mirror control module or driver door module
Typical repair costs for U1194 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Non-functional mirrors reduce situational awareness and present a safety hazard. Vehicle is drivable but mirrors should be manually adjusted before driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1194 to identify the root cause.
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Quick Info
Category
Network
System
Body/Convenience Systems
Difficulty
Type
Manufacturer
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