P0300 and p0173

[The Banks]

So I scanned my car with HP tuners after I started misfiring and got DTC P0173 and P0300. Long term fuel trim bank 2 and random/multiple cylinder misfire. This seems kind of coincidental, but this seemed to show up when I filed up last time and used an STP gas treatment additive. Could that possibly be the problem, or is it among the other general problems that throw out the infamous P0300 such as (plugs, wireset, coilpack, clogged cat, dirty injectors...)

[inheritthefire]

Re: P0300 and p0173

I had the P0300 code a while back, turned out to be a Fuel Pressure Sensor.

That's my 2 cents.