U0426Invalid Data Received From Vehicle Immobilizer Control Module
- Generic OBD-II code · Network
- How the car detects it
- The vehicle immobilizer control module reads the transponder in the key and passes a coded release to the engine controller. U0426 is logged when that release or status message arrives but cannot be accepted, so the handshake fails even though the module is still talking. Stellantis documents a case on the 2015-2018 Ram ProMaster: the BCM holds U0426-31, labelled Minikrypt error, together with an intermittent no-start and a stuck key; the PCM did not power down at key off, and aftermarket equipment had disturbed the ignition feed circuits, so the voltages at each switch position must be checked (STAR case S2008000160). Ford's 2014 code list includes U0426 without a MIL flag. Lost contact is U0167, a software mismatch U0326; U0427 covers the security module. Typically the starter turns but the engine never fires.
- What you may notice
- Engine cranks but does not start, or no start at times
- Security or key warning lamp flashing
- Key hard to remove from the ignition
- Likely causes
- LikelyIgnition feed voltages do not match the key position, often due to aftermarket equipment
- PossibleDamaged key transponder or key not matched to the vehicle
- RareImmobilizer module or antenna faulty
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.