What Does U010E Mean?
The PCM has lost communication with the diesel exhaust fluid (DEF) reductant control module that manages selective catalytic reduction (SCR) systems. This affects the emissions control system in diesel vehicles.
Common Causes
35%
Reductant control module internal circuit failure
30%
Corroded or damaged wiring/connectors in DEF system circuit
20%
CAN bus network communication fault
10%
DEF system freezing causing module power loss or damage
5%
PCM or module software incompatibility
Diagnostic Steps
1
Step 1: Verify power and ground supply to reductant control module, check all fuses and relays
2
Step 2: Inspect DEF system wiring and connectors for corrosion from DEF leakage (highly corrosive)
3
Step 3: Check CAN bus communication signals at reductant module connector
4
Step 4: Verify DEF heater operation if cold weather related, ensure module isn't frozen
5
Step 5: Check for DEF contamination or crystallization affecting module operation
Estimated Repair Cost
$200 - $1,800
Parts + labor, varies by vehicle and location
The PCM has lost communication with the diesel exhaust fluid (DEF) reductant control module that manages selective catalytic reduction (SCR) systems. This affects the emissions control system in diesel vehicles.
The most common cause of U010E (Lost Communication With Reductant Control Module) is: Reductant control module internal circuit failure
Typical repair costs for U010E range from $200 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may experience reduced power or speed limiting after extended operation. Some vehicles will not restart after shutdown if issue persists per EPA regulations.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U010E to identify the root cause.
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Quick Info
Category
Network
System
Diesel Emissions Control / Network Communication
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
