How to fix and find code P0302 cylinder2 - 2009 Chevrolet Aveo

p0302 is a misfire at number 2 cylinder which can be caused by a burnt cylinder up to you to compare cost of repair verses dumping vehicle get estimates on a replacement head --valve ob --engine replacement etc https://www.engine-codes.com/p0302_ford.html https://www.obd-codes.com/p0302

All codes are OBD2 on free online , try it.
https://www.fixdapp.com/blog/p0302
https://www.fixdapp.com/blog/p0335
https://www.yourmechanic.com/article/p0202-obd-ii-trouble-code-injector-circuit-malfunction-cylinder-2-by-spencer-clayton

the p0300--p0301-p0302=p0303 are misfire codes and can mean needs tune up or wiring problem and p0171 is system to lean bank 1 with this code if you correct it will probably correct the misfire codes your receiving
http://www.obd-codes.com/p0171 Fixing Hesitating Car P0171 Code YouTube P0171 System Too Lean Bank 1

p0302 is a misfire code at #2cyl,may be cause of other codes,?p210-codes have 5

did you google these codes?

That is a possible cylinder misfire on cylinder
#2

You didn't say what vehicle.motor etc.

It is an ignition issue,not spark plugs or
likely wires,so forget them

the codes are p0302 and p0303 p0302 if a misfire in cylinder number 2 p0303 is a misfire in cylinder number 3

P0302 is a misfire in cylinder #2. When was the last time you changed spark plugs? That's the most common cause of a misfire.

check your plug,wire, and especially the boots, if theyre cracked they can cause your spark to arc and create your misfire in that cylinder. You may need simply a tune up for that matter.

P0302 is cyl #2 misfire and the other 2 are lean or rich codes because of the misfire repair code P0302 first and the other 2 codes will most likley clear up.