What Does U0426 Mean?
The receiving control module has detected invalid or corrupted data from the immobilizer system over the vehicle network. This can prevent the engine from starting or cause starting issues.
Safety Warning
May cause no-start condition, potentially stranding the driver. Vehicle security system may be compromised.
Common Causes
30%
Faulty immobilizer control module or IMMO antenna ring
25%
Damaged CAN bus wiring or connectors to immobilizer module
20%
Low battery voltage or poor power/ground connections
15%
Immobilizer key or transponder programming issue
10%
Software corruption or version mismatch between immobilizer and ECM
Diagnostic Steps
1
Step 1: Verify battery voltage is above 12V and check all power and ground connections to immobilizer system
2
Step 2: Inspect CAN bus wiring and connectors between immobilizer module and ECM for damage or corrosion
3
Step 3: Attempt to read immobilizer data with advanced scan tool and verify key/transponder recognition
4
Step 4: Check for software updates or TSBs related to immobilizer communication issues
5
Step 5: Test immobilizer module operation and replace if defective; reprogram keys if necessary
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The receiving control module has detected invalid or corrupted data from the immobilizer system over the vehicle network. This can prevent the engine from starting or cause starting issues.
The most common cause of U0426 (Invalid Data Received From Vehicle Immobilizer Control Module) is: Faulty immobilizer control module or IMMO antenna ring
Typical repair costs for U0426 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause no-start condition, potentially stranding the driver. Vehicle security system may be compromised.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0426 to identify the root cause.
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Quick Info
Category
Network
System
Security System / Engine Starting
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
