CEL Code P0320...is my coil bad?

HI. This morning the car would not start. The battery was strong and everything was cranking but no go. So I opened the hood and started pushing in all the connections just to make sure everything was tight fit and surprisingly the engine cranked up and stared.....but not without leaving me a CEL light on. So I went to Autozone and they verified code P0320.

P0320 - Ignition Engine Speed Input Circuit Malfunction The ignition engine speed sensor input signal to PCM is continuously monitored. The test fails when the signal indicates that two successive erratic profile ignition pickup (PIP) pulses have occurred. Loose wires/connectors.
Arcing secondary ignition components (coil, wires and plugs)
On board transmitter (2-way radio)
The DTC indicates that two successive erratic PIP pulses occurred.

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Now according this this my connections might have been bad but the light is still on and once the car starts everything runs fine but sometimes it seems like it is hesitant to start. I am about to replace my coil with an MSD Blaster coil in a few days but until then I need the original coil to get me around. Any idea what it could be? Thanks.