Since this thread doesn't seem to die, I'm gonna go ahead and share my attempt to battle this code. Story time...
I bought the car in December 2021. Code popped on for the first time in February 2022. I was going through fixing some of the issues the PO had neglected, and level setting the routine maintenance items, as this car didn't come with service records. PO had never mentioned this code popping up before, but to be fair, there were more than a couple things the PO failed to mention when selling me the car.
I already had a cam follower ordered and was waiting for it in the mail when the code popped up. After reading up on this thread and others, I also bought the fuel pressure sensor on the HPFP, and a fuel filter, planning on starting with the easier/cheaper items and working my way up.
When I replaced cam follower and the pressure sensor on HPFP, cam was not in correct orientation to get a look at it unfortunately, so that's still on the table. The cam follower I took out looked fine. PO said it had been done recently, and might have been telling the truth. Code was back within 48 hours after being cleared.
A couple days later, the OEM fuel filter arrived, and I threw that in. The code stayed away for two months! Here I was thinking I was one of the lucky ones. Nope.
I let the code sit there over the weekend while I continued to research this thread and others. I drove the car to work on Monday, and made it halfway there before realizing the CEL was gone! I immediately pulled out my code scanner and plugged it in to find the code still on the ECU. I cleared it, and finished driving to work. No more code... until Tuesday. It did the exact same thing. The CEL turned on for 24-48 hours. and then turns itself off, but still stays stored on the ECU. Rinse and repeat about 1-2 times a month. Every time it turns back on, I check it to make sure it'll be the same thing. The last time I checked it, I got a different error description, but the same code.
I struggle with blindly throwing parts at this issue trying to chase down a code that seems to be nearly impossible to get rid of. But at the same time, the car seems like it has fueling issues that should be addressed. It struggles to start sometimes, or will start and then almost immediately die. Once the car is running, it idles well, and doesn't feel like it's struggling to keep supplying fuel under hard pulls. I want the satisfaction of coming back to this thread with no code for an extended period of time. But only time will tell.
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Originally Posted by ifloppedtrips
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