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I Googled that code. Here is what I found:
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Have you replaced the fuel filter. That is the easiest thing to replace.
If you haven’t got some dirty fuel or water the HPFP shouldn’t be bad in 75000 miles. Why did they replace an injector? Was it leaking?
Lynwood
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