Did they say what the TSB was? I didn't see any TSB relating directly to the fuel pump module, there were a ton of TSBs and recalls, I only included the ones having to do with safety issues, or there would have been 40 pages of bulletins.
But I am including below the necessary information you'll need, having to do with the P062A code. It sounds like the shop or dealership did not want to pay for diagnostic time and made excuses to not repair the vehicle.
The purpose of having a separate fuel pump control module (FPCM) instead of a conventional system is to be able to have a variable fuel pump system to save on the electrical load put on the engine. They cause more problems than they solve though. There are other faults which can cause FPCM codes, things like a fuel rail pressure sensor, but there are a number of different codes for the module. Page 4 has a list of the most probable causes for that code. I went through all the information on the module and besides these 5 pages the rest was all based on other FPCM codes.
I'm not sure how much live data you can look at with your scan tool, most global obd2 scan tools can at least pull up live engine data, so if it can, take a look at anything to do with the fuel system. Any "Desired" and "Actual" readings, or the Long Term and Short-Term Fuel Trims. Take a look at the Fuel Rail Pressure sensor if you can.
Plug in the scan tool and just do a key on engine off boot up and get to the live data, then start the vehicle.
One other thing is, if you have not cleared the code yet, there will be Freeze Frame data for when the code is set, this can help to see what the conditions were when it set and can help with diagnosing the issue.
But check the FPCM connector first for any corrosion, that is the most common fault with these, especially up north where they use salt on the roads.
The issue with that one spark plug wouldn't really have anything to do with a FPCM code, which would be more of a cylinder misfire code, which I'm surprised you didn't have.
I hope this information helped somewhat, if you can't find any issues and the code keeps coming back, I have the wiring diagrams for the module and we can check it for power and grounds and see if there's anything going on there.
The code can be set by too much current going to the fuel pump too, so it might be the pump on its way out.
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Sunday, October 30th, 2022 AT 8:17 PM