Traction control light/ check engine P0301
 

I've searched the forums. I got the code pulled as a P0301. I bought 4 new spark plugs. Should I replace coil packs as well as the Cam Shaft Position Actuator Valves or is that wasting money?

suggestions?

2007 HHR LT 2.4L

I would repair the misfire code first. There can be many things that can cause it.
The spark plugs are the best place to start. I would change the plugs and swap coil 1 with cyl number 4.
If your misfire returns to number 1 your next step would be a compression test if your misfire returns to number 4 you will know you need to replace the coil.
The traction control may be disabled because or the misfire code

The TC light may come on anytime a performance related code is set.

Thank you for the input. I replaced the plugs and cleaned the MAF, but the Engine light stayed on and the T/C light still comes on. Which side of the engine is Cylinder #1? Passenger side or Drivers? and what coil pack is #4 if I am standing at the front bumper looking towards the engine?

Cyl one is on the passenger side. Did you clear the codes? The codes can be cleared with a scan tool or disconnecting the negative battery cable for a few minuets.

I disconnected the batt and cleared the codes (thanks!) But after a brief test drive, the engine light came back on as well as the T/C light. The engine seems a bit rough at a stop light and that is when the light comes on.

I've switched the coil packs and cleared the codes again, going to take a ride to autozone and have it read to see if its changed to P0304.

Do keep us posted -

The Cam Shaft Position Actuator Valves are not likely a suspect at this point - they usually generate codes in the range of p0010/11/12/14.

I think I've ruled out a faulty coil pack. I still got a P0301 code even after I've switched the two outer most coil packs on the engine...

suggestions?

car has 89,000 miles

Next step is to switch 2 injectors.

And make for sure you got the MAF plugged in good.

Don's suggestion is a good next step. If you have a compression tester you could do a quick compression test to rule out an engine problem.