It starts sometimes, but cranks and doesn't start most of the time. When it does start by chance, the engine shakes and then smooths out. After driving it and it sits, it wont start until it sits for a long time. Ive replaced:
Fuel pump, plugs, fuel injectors, ignition switch, crankshaft sensor, camshaft sensor.
Can you please tell us some more information?
It was the oil pressure switch
Ive replaced:
Fuel pump, plugs, fuel injectors, ignition switch, crankshaft sensor, camshaft sensor.
Spraying parts at a car without doing research usually doesn't work and ends up being very expensive. A 5 second google search tells you the code has nothing to do with those parts.
P2646 - Rocker Arm Oil Pressure Switch Circuit Low Voltage
Does your engine have a bad oil leak?
You could try changing the oil and switching to a different brand of oil filter.
Hondas need the valves adjusted periodically. Have you been keeping up on the maintenance in your owner's manual?
Try the troubleshooting on this page:
https://www.700r4transmissionhq.com/p2646-acura-tl/
Yeah I had about 6 codes, now down to the p2646 which i dont think is whats causing it to stall.
2005 Acura Rsx, 225,000 miles.
DTC P2646