I’m a little behind, but about Geoff and Emily’s car troubles:

As a mechanic, just wanted to offer a couple things worthy of note:

1. Your car can, but will not tell you the meaning of a trouble code, because a trouble code is a symptom, not necessarily a cause. If your car said “fuel pressure sensor failure”, people would just replace that sensor, but here’s the thing- the sensor could be working great, and is simply reading incorrect fuel pressure, which could be due to a failing pump or clogged filter. Replacing the sensor may not fix the problem, and you’d have just wasted that money.

2. Likewise, AutoZone reading the code is not a diagnosis. Sometimes they’ll get lucky and it is indeed a bad sensor, but other times, you get the result I described above - sensor was fine, and it was indicating that something else is wrong. No knock on autozone employees, but if they were as skilled as mechanics, they’d be mechanics- it pays a hell of a lot more. Take their advice with a grain of salt, they may be right, they may be horribly, expensively wrong and their bear no liability for being wrong.

3. If the fuel pressure sensor is reading incorrectly, the car should enter limp mode to protect itself. But even in limp mode, damage can occur. It is possible that too much fuel is being sent to the engine, which will fill up the crankcase and can damage the bearings or even cause a fire/explosion. If the car enters limp mode, that’s not to let you drive it until you can get to fixed, that’s to let you maneuver it off a body road and stop somewhere safe while you wait for a tow truck.