What Does U0113 Mean?
Critical emissions control information is not being transmitted between control modules on the vehicle network. This prevents proper coordination of emissions systems and may cause the vehicle to fail emissions compliance requirements.
Safety Warning
Vehicle may fail emissions testing and could enter reduced power mode. The malfunction indicator lamp will remain illuminated, and emissions systems may not function properly.
Common Causes
35%
Communication network wiring fault or damaged connectors
25%
Failed engine control module or transmission control module
20%
CAN bus circuit fault or termination resistor failure
15%
Power supply or ground circuit problem
5%
Software version mismatch between modules
Diagnostic Steps
1
Step 1: Check all module power supplies and ground connections for proper voltage and continuity
2
Step 2: Use scan tool to identify which specific modules are failing to communicate emissions data
3
Step 3: Inspect CAN bus wiring and connectors between ECM, TCM, and other emissions-critical modules
4
Step 4: Verify CAN bus network integrity by measuring resistance and signal voltage on CAN High and CAN Low
5
Step 5: Check for software updates for all emissions-related modules and perform synchronized programming if needed
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
Critical emissions control information is not being transmitted between control modules on the vehicle network. This prevents proper coordination of emissions systems and may cause the vehicle to fail emissions compliance requirements.
The most common cause of U0113 (Lost Communication With Emissions Critical Control Information) is: Communication network wiring fault or damaged connectors
Typical repair costs for U0113 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may fail emissions testing and could enter reduced power mode. The malfunction indicator lamp will remain illuminated, and emissions systems may not function properly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0113 to identify the root cause.
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Quick Info
Category
Network
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
