New official member here, hoping to get some help from the experienced tsx community. I bought an A/T 2009 TSX over a year ago with 108K, which now currently has 140K.
2 months ago one morning it barely started, it gave me a code p0339 (crankshaft position sensor -intermittent). I had an apt I couldn’t miss so I took another car to be safe that day. It’s always ran fine, even with the code I continued to drive it daily w/o any issues. I assumed I needed a new crankshaft sensor, didn’t have the funds at the time to get an OEM one put in, wasn’t giving me issues (just a message at this point, the check engine light only showed up that one time) so I kind of ignored it.
Now it seems like it’s finally gotten worse, drove into town tonight & I felt some very minor deceleration at about 45mph. Felt more like tiny jerks, 2 jerks in about 12 miles total, only lasted a second each, i got home fine.
When i got home I shut it off & turned it back on again, it barely turned on, cut off right away. Attempted to start it again & it started right up the second time.
NOW, that it is giving me problems, I started to do some research. Being that my code is NOT a sensor malfunction but rather an intermittent signal, I’m not 100% on it just being a bad sensor. After some reading online, some posts suggested that it could be something minor causing intermittent signals such as:
*weak/bad starter (highly doubt, replaced less than a yr ago)
*weak/bad battery
*loose/corroded terminals or grounds
*loose connector
*break in harness
In the morning I’ll run to the local parts store to get my starter/battery/alternator checked. If all that checks out, my next step would be to inspect the other stuff listed above. Worst case, if I can’t find another cause I will pick up the new sensor, but I read something about a relearn process that must be done if the sensor is removed/replaced...
(would appreciate it if anyone could possibly drop a link on the relearn process or give me an idea of where to look?)

So before I complicate things or start throwing $ at it
Any of you guys had the same code/symptoms?
Found a solution or got any tips?
It’s my first post so bear with me
Appreciate any & all feedback, here’s some pictures 🙂