I have a 2011 Chevy HHR.

I recently changed out the condenser and recharged the A/C cause she hasn't had A/C since I got her a year ago (condenser had a hole).

When the A/C is on the engine runs really rough, otherwise she runs just fine. The engine light is on and code readers are saying there is a random misfire.

The "SERVICE TRACTION" and "SERVICE ESC" are constantly one. Occasionally my car will do the little seatbelt ding to remind me. But this has been on since I got the car.
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I'm the last year these are the parts I've replaced, just to kind of eliminate what might be the issue:
BatteryAlternator Front, lower control armsBreaksRotorsMAF sensorIntake and Exhaust solenoidsWooly hose Radiator hoseCabin air filterSpark plugsCoil packsCompressorCoolant reservoirNegative battery cable/terminal
Rear shocks (in shop)

I have no idea what else it could be and I really don't wanna take her to a shop when I can probably do it myself.

 

I can only imagine how much money you wasted on good parts and you're worried about money.
Need the codes. A multi-meter and know how to use it.
Can we do that?

 

I didn't waste money on good parts (stuff needed to be replaced) and I ain't worried about money. I had fun messing around with her, it was also good learning and I LIKE working on my car.

I have the codes: P0300 and P0301.

I can get a multimeter from work and I do know how to use it.

However, I think I would prefer help/advice from someone not so condescending. Thanks though 🤙
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P0301 points to cylinder #1 misfire. I would do a compression test.
P0300 is just a general code for misfire detected.
The traction and esc light are most likely on because the CEL is illuminated. It just means the computer has shut off those 2 systems because of that CEL.

 

Move the #1 spark plug to #2, and the #1 coil to #3. See if the code changes to follow one of these parts.

Did you install ACDelco 41-103 spark plugs? These engines can be pretty finicky for these plugs.

 

Welcome to the site. Check the coil and fuel injectors electrical connections for loose or broken wires

 

I have a 2011 hhr lt 2.2lt that sat for a yr and 1/2 that was running to rich and would run right when we would reset the trim codes. I always used e87 never used e85. Just switched to e85 and tbat helped with the running rich code so now that’s gone and was running fine for like a few days but now it has a constant misfire on cylinder 2 and bank 1 sensor to lean code and was jerking while and running rough while in idle. So I changed and gapped the spark plugs to specifications cleared codes, still same codes came back. So I moved to the coil pack from cylinder one to cylinder 2 rest codes drove it few min later sams codes came back. I proceeded to then check The fuel injectors and swap cylinder two fuel injector with cylinder one reset the codes drove it for a few minutes and it misfired again same codes popped up misfire on cylinder two and Bank one to lean. so I moved onto a compression test and I had even compression across-the-board. I change the O2 sensor upstream right before it sat, but I’m assuming that why it was running Rich it most likely burned up the O2 sensor not the maf sensor, but did add a new map sensor, which changed nothing would like to note that fuel injectors had lots of carbon buildup around the O-rings to the point where I had to pull them out one by one and some boots even stayed in and had to be out with plyers. I did not change the fuel injectors, just simply swapped them from the bad cylinder, and as stated did not get a misfire on the cylinder that now has cylinder 2 injector. Have not done a few pressure test, but will be doing one when we change the O2 sensor and while my mechanic is changing the O2 sensor, I will be adding a new fuel injector to cylinder two to see if it improves the misfire. Anyone have any suggestions on what to check if none of the things listed above, solve the misfire. Would like to note that the misfire is consistently only on cylinder number two.