U3033Control Module Security Certificate Missing/Invalid
- Generic OBD-II code · Network
- How the car detects it
- U3033 reports that a module's own security certificate is absent or fails validation, so the unit cannot prove its identity in signed or encrypted exchanges. Stellantis uses the code in the security gateway (SGW) and in connected radios. For 2020 Durango and Pacifica radios, case S2008000164 explains that the certificate is fetched once the car is online and that a stored entry may need as many as 40 key cycles before it disappears; no part is to be replaced. Later bulletins for Ram, Jeep Wagoneer, Grand Cherokee and Dodge Charger (08-322-25, 08-173-26, 9100701) name U3033-00/-01 in the SGW, state that it leaves the MIL off and fix it by reflashing the SGW when the over-the-air update failed. Bulletin 9100386 adds checks of connectivity and the Ethernet network and reloading the certificate store.
- What you may notice
- Code active or stored and cannot be cleared, usually without MIL
- Security gateway not answering the diagnostic tester
- Message asking for an over-the-air update or a service visit
- Likely causes
- LikelyCertificate not yet downloaded because the vehicle had no connectivity
- LikelyGateway software setting the code erroneously, fixed by reflash
- PossibleOver-the-air update not completed
- RareCertificate store empty or holding a wrong certificate
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €0 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.