Network
generic or reserved
U3034
Communication Authentication Key/Certificate Missing/Invalid
The cryptographic key or certificate used to authenticate inter-module communication is missing or invalid.
SystemNetwork
Typegeneric or reserved
GroupU3
Range / number– / 34
Possible causes
- Key not provisioned high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 100–800 €
- Estimated time: 0.5–3 h
- Component: control module
- Component: security module
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012