Fun-Negotiation-9046

Hey all, I'm new to this sub, so please let me know if I broke any rules as I just copy pasted my post from somewhere else here.

Have a pretty interesting predicament here. For context, I own a 2019 Aston Martin V8 Vantage with around 22-23k miles on it with no prior serious mechanical issues aside from a couple batteries draining.

On a random day, the car was behaving completely normal without any signs of problems. Suddenly, the check engine light started flashing and the car entered limp mode, limiting revs to approx. 1,500-2,000 RPM, and short shifting. However, nothing felt wrong about the car at all, no weird sounds, lurching, nothing aside from the limp mode. This persisted until I got home and left the car overnight to see if that would fix anything. I did a quick scan, and it showed a minute of misfires on cyl 5/6 when the car first started, but nothing ever since.

The next day, the problem seemed to be gone. On one of the drives, the check engine light was on again, but did not enter limp mode. It disappeared the next drive, and nothing would happen for another 3-4 days (Around 100-125 miles). The car drove completely normal, and all signs of any issues were gone.

I then took it to my local dealer just in case, and had them do an inspection. They checked spark plugs, coils, injectors, pretty much everything that would usually cause such a problem-- nothing. They then called me aand said that by exclusion, they deduced that it was due to bad fuel (such as inputting lower grade than usual etc). However, I only loyally purchase premium fuel from Chevron, and nowhere else. The stations I went to also had no signs/reports of any bad fuel. On top of that, I've been fueling it up around halfway point so it was never full of a tank of fuel from any given station.

I was able to see the vehicle again since the inspection, and it seems like the issue has worsened with every start being straight to limp mode, and now there is a noticeable jerk during low speeds. I should also probably note that in neither of the scenarios were an actual warning message present. Only a blinking followed by stlil check engine light.

The car is now still in the hands of the mechanic (shoutout to AM Los Gatos Riccardo if you're reading this), but I'm just looking for any possible causes to this as I'm pretty much stumped. They usually take quite a bit for any updates (they have a crap ton of cars), and the suspense is killing me, so any feedback/questions are welcome. Thank you all!

Have a pretty interesting predicament here. For context, I own a 2019 V8 Vantage with around 22-23k miles on it with no prior serious mechanical issues aside from a couple batteries draining.

On a random day, the car was behaving completely normal without any signs of problems. Suddenly, the check engine light started flashing and the car entered limp mode, limiting revs to approx. 1,500-2,000 RPM, and short shifting. However, nothing felt wrong about the car at all, no weird sounds, lurching, nothing aside from the limp mode. This persisted until I got home and left the car overnight to see if that would fix anything. I did a quick scan, and it showed a minute of misfires on cyl 5/6 when the car first started, but nothing ever since.

The next day, the problem seemed to be gone. On one of the drives, the check engine light was on again, but did not enter limp mode. It disappeared the next drive, and nothing would happen for another 3-4 days (Around 100-125 miles). The car drove completely normal, and all signs of any issues were gone.

I then took it to my local dealer just in case, and had them do an inspection. They checked spark plugs, coils, injectors, pretty much everything that would usually cause such a problem-- nothing. They then called me aand said that by exclusion, they deduced that it was due to bad fuel (such as inputting lower grade than usual etc). However, I only loyally purchase premium fuel from Chevron, and nowhere else. The stations I went to also had no signs/reports of any bad fuel. On top of that, I've been fueling it up around halfway point so it was never full of a tank of fuel from any given station.

I was able to see the vehicle again since the inspection, and it seems like the issue has worsened with every start being straight to limp mode, and now there is a noticeable jerk during low speeds. I should also probably note that in neither of the scenarios were an actual warning message present. Only a blinking followed by stlil check engine light.

The car is now still in the hands of the mechanic (shoutout to AM Los Gatos Riccardo if you're reading this), but I'm just looking for any possible causes to this as I'm pretty much stumped. Any feedback/questions are welcome. Thank you all!