P0302 Code 2007 Chevy Cobalt 2.2L

james

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Hello I am getting a P0302. I have changed out spark plugs, and also swapped out the coil packs from cylinder 2 and 3. I have run some fuel injector cleaner, and the code went away for a little while.

It will shift hard from 1st to 2nd gear sometimes, but I think that is tied with the P0302 code.

Not sure if this was a coincidence or not, but the code came up a day after I was changing the transmisison fluid, so I am not sure if I bumped a vacuum line loose, or cause it to crack since it does have 212K miles on it. Below is the readings I am getting from the freeze frames from when the CEL light came on. Any help would be appreciated.


Fuel Status = 0 byte
Engine Load = 31.765 %
Engine Coolant Temperature = 116.6 °F
Fuel Trim Bank 1 Short Term = 0 %
Fuel Trim Bank 1 Long Term = 4.688 %
Intake Manifold Pressure = 5.221 psi
Engine RPM = 961.75 rpm
Speed (OBD) = 0 mph
Timing Advance = 9.5 °
Intake Air Temperature = 78.8 °F
Mass Air Flow Rate = 4.86 g/s
Throttle Position(Manifold) = 27.451 %
Run time since engine start = 56 s
Fuel Level (From Engine ECU) = 84.706 %
Distance travelled since codes cleared = 1.864 miles
Evap System Vapour Pressure = -2 Pa
Barometric pressure (from vehicle) = 14.504 psi
Catalyst Temperature (Bank 1,Sensor 1) = 908.6 °F
Voltage (Control Module) = 14.607 V
Engine Load(Absolute) = 23.137 %
Commanded Equivalence Ratio(lambda) = 1
Relative Throttle Position = 13.725 %
Ambient air temp = 77 °F
Absolute Throttle Position B = 27.059 %
Accelerator PedalPosition D = 19.608 %
Accelerator PedalPosition E = 9.412 %
 

YelloEye

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Since you already did plugs and coils, the next thing to try is injectors.
 

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