NetworkU0426
SeriousSeverity: Serious - have it checked soon
Invalid Data Received From Vehicle Immobilizer Control Module
Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list
1What it means in plain English
Control modules in the car cannot communicate with each other over the vehicle network.
2Common causes
- Wiring or connector fault on the communication bus
- Faulty control module
- Low battery voltage or poor ground
- Water ingress in a connector or module
- Aftermarket device interfering with the bus
3Can I drive?
The car may run normally or may not run at all. If the module that has lost communication controls steering, brakes, park brake, charging or engine cooling, drive only if those systems feel normal; stop safely if the steering becomes heavy, a brake warning appears, or the engine temperature climbs. If the car will not start or runs badly, have it towed.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 29
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| BAIC Motor | U0426 | IMM_Authentication Fail Brand | Network |
| Mercedes-Benz | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| BYD | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module Brand | Network |
| Chery | U0426 | Immobilizer function Brand | Network |
| Daewoo | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module Brand | Network |
| DFFS | U0426 | Immobilizer authentication failed Brand | Network |
| DFFX | U0426 | immobilizer authentication failed Brand | Network |
| DFXK | U0426 | Immobilizer authentication failed Brand | Network |
| EOBD | U0426 | Ogiltig data mottagen från styrmodul för startspärr Brand | Network |
| Ford | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| Geely | U0426 | IMMO (Immobilizer) Authentication Error Brand | Network |
| GM | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module Brand | Network |
| Great Wall | U0426 | IMM_Authentication Fail Brand | Network |
| Hafei | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module Brand | Network |
| Holden | U0426 | Immobilizer Security Code Not Programmed Brand | Network |
| Hyundai | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| Land Rover | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| Maserati | U0426 | Implausible data received from vehicle security control module Brand | Network |
| Mazda | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| Opel | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module Brand | Network |
| Peugeot | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| Saab | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module Brand | Network |
| MG (SAIC) | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module Brand | Network |
| Sprinter | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| Subaru | U0426 | Invalid Data Received From Vehicle Immobilizer Control Module SAE | Network |
| SWM Motor | U0426 | immobilizer authentication failed Brand | Network |
| Tata | U0426 | Immobilizer Brand | Network |
| Toyota | U0426 | Immobilizer authentication failed (C426) Brand | Network |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 3
These 7-character codes are manufacturer-specific variants of U0426 and may be reported by some scan tools.
6Related codes
Browse Uxxx codes or U042xx codes.