I had a 2015 Panamera 4 (55k miles) come in few weeks ago throwing code P1530 Off Time. I recoded the gateway and instrument cluster and the code didn't return. Customer came back yesterday stating the check engine light came back. The fault memory shows it occurred twice since the last time the customer came in. I asked the customer if any mileage blockers were installed and they said nothing has been installed. I've checked software versions and part numbers for the DME, Gateway, and Instrument Cluster and everything checks out. The code isn't consistent and I'm not sure how to go about diagnosis. Any information would help a lot.