U0326Software Incompatibility With Vehicle Immobilizer Control Module
- Generic OBD-II code · Network
- How the car detects it
- The vehicle immobilizer control module checks the transponder or smart key and releases the engine controller only after a coded exchange. U0326 means that a controller, usually the engine controller, does not accept the immobilizer's software or stored codes, mostly once either unit has been renewed or reprogrammed. No manufacturer documents U0326 publicly. Subaru uses its own code for this mismatch on 2016-and-later models: B1571, reference code incompatibility between immobilizer and ECM, found by the keyless access module (18-230-26). Chrysler reprogrammed PCMs of 2012–2013 Grand Voyager diesels because handshake failures with the wireless control module were stored as the wrong codes (18-023-13). U0167 is lost contact, U0426 invalid data, U0327 concerns the security module. The engine may crank but not start.
- What you may notice
- Engine cranks but does not start, or starts and stalls at once
- Security or key lamp flashes in the cluster
- Keys are not recognised after module work
- Likely causes
- LikelyEngine controller or immobilizer unit replaced without pairing the security codes
- PossibleUsed module from another vehicle fitted, carrying foreign codes
- RareSoftware of engine controller and immobilizer on incompatible levels after an update
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.